Skin Care Library

Learn about the best ingredients for your Baumann Skin Type® on the Skin Care library.

Elastin in Skin

By Dr. Leslie Baumann on Sep 10, 2023

This article reviews what elastin fibers are, how to restore them in skin with products, supplements and diet. This blog discusses the differences between collagen and elastin. It also discusses how to measure elastin in skin.

Read more
How Was the Skin Type Quiz Validated?

By Dr. Leslie Baumann on Jul 16, 2023

Only STS and STS Approved Medical Providers have the legal right to use the Baumann Skin Type Quiz and skin care routine builder. Learn how we spent the last 17 years developing and validating this scientific system. It is now the skin type quiz used by dermatologists around the world.

Read more
Understanding Retinol Percentages and Retinoid Strengths

By Dr. Leslie Baumann on Apr 30, 2023

This Retinol Strength Chart will help you understand retinol percentages, compare strengths of retinoids, and find the strongest retinol over the counter and prescription strength retinoids.

Read more
Skin pH and Skin Care Products

By Dr. Leslie Baumann on Apr 01, 2023

What is pH? Does the pH of skin care products matter? What pH to use for different skin conditions.

Read more
Maltese Cross Pattern in Moisturizers

By Dr. Leslie Baumann on Oct 17, 2022

The best barrier repair moisturizers display a maltese cross pattern when viewed under a cross polarized microscope. What is the maltese cross pattern?

Read more
Stem Cells vs Growth Factors vs Exosomes In Skin Care

By Dr. Leslie Baumann on Oct 08, 2022

Guide to the difference between human growth factors, human stem cells and human derived exosomes.

Read more
What Are The Causes of Aging Skin?

By Dr. Leslie Baumann on Oct 07, 2022

Learn about the most recent developments in the science of skin aging. This guide discusses free radicals, matrix metalloproteinases, cellular senescence, autophagy, telomere shortening, and sirtuins.

Read more
Skin Care Ingredients that Protect Skin from Pollution

By Dr. Leslie Baumann on Oct 03, 2022

Pollution ages skin, causes inflammation, and can cause skin hyperpigmentation. We can protect skin from pollution, but how? What skin care ingredients protect skin from pollution? This blog discusses what pollution does to skin and how to prevent this damage.

Read more
Extracellular Vesicles in Skin Care

By Dr. Leslie Baumann on Oct 01, 2022

Exosomes are a form of extracellular vesicle. So- what is an extracellular vesicle?

Read more
Targeting Cellular Senescence and Skin Aging with Skin Care

By Dr. Leslie Baumann on Sep 24, 2022

Cellular senescence is one of the hallmarks of skin aging and is a skin aging biomarker. What is cellular senescence and can skin care target senescence?

Read more
Fatty Acids in Skin Care

By Dr. Leslie Baumann on Sep 19, 2022

Many ingredients found in moisturizers have fatty acids. Lipids are comprised of fatty acids. The type and amount of fatty acids in moisturizers, especially barrier repair moisturizers, determines their effects. Learn which fatty acids are anti-inflammatory and which help repair the skin barrier.

Read more
Autophagy and Antiaging Skin Care Ingredients

By Dr. Leslie Baumann on Sep 14, 2022

Autophagy is very important to have young skin beautiful skin. What is autophagy, what are the benefits of autophagy and what skin care ingredients increase autophagy?

Read more
Exfoliation vs Desquamation of Skin

By Dr. Leslie Baumann on Aug 08, 2022

The key to glowing skin is desquamation and exfoliation of the epidermis. Exfoliation and desquamation of skin occur when cells from the top outer layer of the skin known as the stratum corneum is removed.

Read more
The Science of Skin Inflammation

By Dr. Leslie Baumann on Jul 14, 2022

The various mechanisms of skin inflammation are discussed. Cytokines, chemokines, free radicals, histamine and kinins.

Read more
Where to Learn Evidence-Based Skin Care Science?

By Dr. Leslie Baumann on Jun 19, 2022

What is Evidence-Based Skincare? The term evidence-based is used by scientists to mean that there is scientific evidence published in peer reviewed high impact research journals to support the use of the skincare treatment. Learn how to know if skincare research is published in a reputable medical publication. Stop believing marketing claims and learn to read medical publications.

Read more
Retinoid Science in Skincare

By Dr. Leslie Baumann on Nov 11, 2021

How do retinoid creams work to treat wrinkles and acne? All retinoids bind the Retinoic Acid Receptor which turns on a cascade of events that prevent skin aging and increase skin collagen. Science lovers will enjoy all the fascinating things we know about how retinoids work to keep your skin looking great.

Read more
Skin Barrier and Causes of A Damaged Skin Barrier

By Dr. Leslie Baumann on Oct 27, 2021

The Skin Barrier is made of skin lipids that surround and protect epidermal skin cells. What does it do and why is it important? How to know if the skin barrier is damaged?

Read more
Layers of Human Skin

By Dr. Leslie Baumann on Aug 30, 2021

How many layers are in human skin? There are 2 main layers of the skin: the epidermis and the dermis. These can be further subdivided into 8 total layers of the skin as seen in the diagrams below. How many layers the skin has depends upon what area of the ...

Read more
Elastin in Skin

By Dr. Leslie Baumann on Sep 10, 2023

This article reviews what elastin fibers are, how to restore them in skin with products, supplements and diet. This blog discusses the differences between collagen and elastin. It also discusses how to measure elastin in skin.

Read more
How Was the Skin Type Quiz Validated?

By Dr. Leslie Baumann on Jul 16, 2023

Only STS and STS Approved Medical Providers have the legal right to use the Baumann Skin Type Quiz and skin care routine builder. Learn how we spent the last 17 years developing and validating this scientific system. It is now the skin type quiz used by dermatologists around the world.

Read more
Understanding Retinol Percentages and Retinoid Strengths

By Dr. Leslie Baumann on Apr 30, 2023

This Retinol Strength Chart will help you understand retinol percentages, compare strengths of retinoids, and find the strongest retinol over the counter and prescription strength retinoids.

Read more
Skin pH and Skin Care Products

By Dr. Leslie Baumann on Apr 01, 2023

What is pH? Does the pH of skin care products matter? What pH to use for different skin conditions.

Read more
Maltese Cross Pattern in Moisturizers

By Dr. Leslie Baumann on Oct 17, 2022

The best barrier repair moisturizers display a maltese cross pattern when viewed under a cross polarized microscope. What is the maltese cross pattern?

Read more
Stem Cells vs Growth Factors vs Exosomes In Skin Care

By Dr. Leslie Baumann on Oct 08, 2022

Guide to the difference between human growth factors, human stem cells and human derived exosomes.

Read more
What Are The Causes of Aging Skin?

By Dr. Leslie Baumann on Oct 07, 2022

Learn about the most recent developments in the science of skin aging. This guide discusses free radicals, matrix metalloproteinases, cellular senescence, autophagy, telomere shortening, and sirtuins.

Read more
Skin Care Ingredients that Protect Skin from Pollution

By Dr. Leslie Baumann on Oct 03, 2022

Pollution ages skin, causes inflammation, and can cause skin hyperpigmentation. We can protect skin from pollution, but how? What skin care ingredients protect skin from pollution? This blog discusses what pollution does to skin and how to prevent this damage.

Read more
Extracellular Vesicles in Skin Care

By Dr. Leslie Baumann on Oct 01, 2022

Exosomes are a form of extracellular vesicle. So- what is an extracellular vesicle?

Read more
Targeting Cellular Senescence and Skin Aging with Skin Care

By Dr. Leslie Baumann on Sep 24, 2022

Cellular senescence is one of the hallmarks of skin aging and is a skin aging biomarker. What is cellular senescence and can skin care target senescence?

Read more
Fatty Acids in Skin Care

By Dr. Leslie Baumann on Sep 19, 2022

Many ingredients found in moisturizers have fatty acids. Lipids are comprised of fatty acids. The type and amount of fatty acids in moisturizers, especially barrier repair moisturizers, determines their effects. Learn which fatty acids are anti-inflammatory and which help repair the skin barrier.

Read more
Autophagy and Antiaging Skin Care Ingredients

By Dr. Leslie Baumann on Sep 14, 2022

Autophagy is very important to have young skin beautiful skin. What is autophagy, what are the benefits of autophagy and what skin care ingredients increase autophagy?

Read more
Exfoliation vs Desquamation of Skin

By Dr. Leslie Baumann on Aug 08, 2022

The key to glowing skin is desquamation and exfoliation of the epidermis. Exfoliation and desquamation of skin occur when cells from the top outer layer of the skin known as the stratum corneum is removed.

Read more
The Science of Skin Inflammation

By Dr. Leslie Baumann on Jul 14, 2022

The various mechanisms of skin inflammation are discussed. Cytokines, chemokines, free radicals, histamine and kinins.

Read more
Where to Learn Evidence-Based Skin Care Science?

By Dr. Leslie Baumann on Jun 19, 2022

What is Evidence-Based Skincare? The term evidence-based is used by scientists to mean that there is scientific evidence published in peer reviewed high impact research journals to support the use of the skincare treatment. Learn how to know if skincare research is published in a reputable medical publication. Stop believing marketing claims and learn to read medical publications.

Read more
Retinoid Science in Skincare

By Dr. Leslie Baumann on Nov 11, 2021

How do retinoid creams work to treat wrinkles and acne? All retinoids bind the Retinoic Acid Receptor which turns on a cascade of events that prevent skin aging and increase skin collagen. Science lovers will enjoy all the fascinating things we know about how retinoids work to keep your skin looking great.

Read more
Skin Barrier and Causes of A Damaged Skin Barrier

By Dr. Leslie Baumann on Oct 27, 2021

The Skin Barrier is made of skin lipids that surround and protect epidermal skin cells. What does it do and why is it important? How to know if the skin barrier is damaged?

Read more
Layers of Human Skin

By Dr. Leslie Baumann on Aug 30, 2021

How many layers are in human skin? There are 2 main layers of the skin: the epidermis and the dermis. These can be further subdivided into 8 total layers of the skin as seen in the diagrams below. How many layers the skin has depends upon what area of the ...

Read more
Elastin in Skin

By Dr. Leslie Baumann on Sep 10, 2023

This article reviews what elastin fibers are, how to restore them in skin with products, supplements and diet. This blog discusses the differences between collagen and elastin. It also discusses how to measure elastin in skin.

Read more
How Was the Skin Type Quiz Validated?

By Dr. Leslie Baumann on Jul 16, 2023

Only STS and STS Approved Medical Providers have the legal right to use the Baumann Skin Type Quiz and skin care routine builder. Learn how we spent the last 17 years developing and validating this scientific system. It is now the skin type quiz used by dermatologists around the world.

Read more
Understanding Retinol Percentages and Retinoid Strengths

By Dr. Leslie Baumann on Apr 30, 2023

This Retinol Strength Chart will help you understand retinol percentages, compare strengths of retinoids, and find the strongest retinol over the counter and prescription strength retinoids.

Read more
Skin pH and Skin Care Products

By Dr. Leslie Baumann on Apr 01, 2023

What is pH? Does the pH of skin care products matter? What pH to use for different skin conditions.

Read more
Maltese Cross Pattern in Moisturizers

By Dr. Leslie Baumann on Oct 17, 2022

The best barrier repair moisturizers display a maltese cross pattern when viewed under a cross polarized microscope. What is the maltese cross pattern?

Read more
Stem Cells vs Growth Factors vs Exosomes In Skin Care

By Dr. Leslie Baumann on Oct 08, 2022

Guide to the difference between human growth factors, human stem cells and human derived exosomes.

Read more
What Are The Causes of Aging Skin?

By Dr. Leslie Baumann on Oct 07, 2022

Learn about the most recent developments in the science of skin aging. This guide discusses free radicals, matrix metalloproteinases, cellular senescence, autophagy, telomere shortening, and sirtuins.

Read more
Skin Care Ingredients that Protect Skin from Pollution

By Dr. Leslie Baumann on Oct 03, 2022

Pollution ages skin, causes inflammation, and can cause skin hyperpigmentation. We can protect skin from pollution, but how? What skin care ingredients protect skin from pollution? This blog discusses what pollution does to skin and how to prevent this damage.

Read more
Extracellular Vesicles in Skin Care

By Dr. Leslie Baumann on Oct 01, 2022

Exosomes are a form of extracellular vesicle. So- what is an extracellular vesicle?

Read more
Targeting Cellular Senescence and Skin Aging with Skin Care

By Dr. Leslie Baumann on Sep 24, 2022

Cellular senescence is one of the hallmarks of skin aging and is a skin aging biomarker. What is cellular senescence and can skin care target senescence?

Read more
Fatty Acids in Skin Care

By Dr. Leslie Baumann on Sep 19, 2022

Many ingredients found in moisturizers have fatty acids. Lipids are comprised of fatty acids. The type and amount of fatty acids in moisturizers, especially barrier repair moisturizers, determines their effects. Learn which fatty acids are anti-inflammatory and which help repair the skin barrier.

Read more
Autophagy and Antiaging Skin Care Ingredients

By Dr. Leslie Baumann on Sep 14, 2022

Autophagy is very important to have young skin beautiful skin. What is autophagy, what are the benefits of autophagy and what skin care ingredients increase autophagy?

Read more
Exfoliation vs Desquamation of Skin

By Dr. Leslie Baumann on Aug 08, 2022

The key to glowing skin is desquamation and exfoliation of the epidermis. Exfoliation and desquamation of skin occur when cells from the top outer layer of the skin known as the stratum corneum is removed.

Read more
The Science of Skin Inflammation

By Dr. Leslie Baumann on Jul 14, 2022

The various mechanisms of skin inflammation are discussed. Cytokines, chemokines, free radicals, histamine and kinins.

Read more
Where to Learn Evidence-Based Skin Care Science?

By Dr. Leslie Baumann on Jun 19, 2022

What is Evidence-Based Skincare? The term evidence-based is used by scientists to mean that there is scientific evidence published in peer reviewed high impact research journals to support the use of the skincare treatment. Learn how to know if skincare research is published in a reputable medical publication. Stop believing marketing claims and learn to read medical publications.

Read more
Retinoid Science in Skincare

By Dr. Leslie Baumann on Nov 11, 2021

How do retinoid creams work to treat wrinkles and acne? All retinoids bind the Retinoic Acid Receptor which turns on a cascade of events that prevent skin aging and increase skin collagen. Science lovers will enjoy all the fascinating things we know about how retinoids work to keep your skin looking great.

Read more
Skin Barrier and Causes of A Damaged Skin Barrier

By Dr. Leslie Baumann on Oct 27, 2021

The Skin Barrier is made of skin lipids that surround and protect epidermal skin cells. What does it do and why is it important? How to know if the skin barrier is damaged?

Read more
Layers of Human Skin

By Dr. Leslie Baumann on Aug 30, 2021

How many layers are in human skin? There are 2 main layers of the skin: the epidermis and the dermis. These can be further subdivided into 8 total layers of the skin as seen in the diagrams below. How many layers the skin has depends upon what area of the ...

Read more
Elastin in Skin

By Dr. Leslie Baumann on Sep 10, 2023

This article reviews what elastin fibers are, how to restore them in skin with products, supplements and diet. This blog discusses the differences between collagen and elastin. It also discusses how to measure elastin in skin.

Read more
How Was the Skin Type Quiz Validated?

By Dr. Leslie Baumann on Jul 16, 2023

Only STS and STS Approved Medical Providers have the legal right to use the Baumann Skin Type Quiz and skin care routine builder. Learn how we spent the last 17 years developing and validating this scientific system. It is now the skin type quiz used by dermatologists around the world.

Read more
Understanding Retinol Percentages and Retinoid Strengths

By Dr. Leslie Baumann on Apr 30, 2023

This Retinol Strength Chart will help you understand retinol percentages, compare strengths of retinoids, and find the strongest retinol over the counter and prescription strength retinoids.

Read more
Skin pH and Skin Care Products

By Dr. Leslie Baumann on Apr 01, 2023

What is pH? Does the pH of skin care products matter? What pH to use for different skin conditions.

Read more
Maltese Cross Pattern in Moisturizers

By Dr. Leslie Baumann on Oct 17, 2022

The best barrier repair moisturizers display a maltese cross pattern when viewed under a cross polarized microscope. What is the maltese cross pattern?

Read more
Stem Cells vs Growth Factors vs Exosomes In Skin Care

By Dr. Leslie Baumann on Oct 08, 2022

Guide to the difference between human growth factors, human stem cells and human derived exosomes.

Read more
What Are The Causes of Aging Skin?

By Dr. Leslie Baumann on Oct 07, 2022

Learn about the most recent developments in the science of skin aging. This guide discusses free radicals, matrix metalloproteinases, cellular senescence, autophagy, telomere shortening, and sirtuins.

Read more
Skin Care Ingredients that Protect Skin from Pollution

By Dr. Leslie Baumann on Oct 03, 2022

Pollution ages skin, causes inflammation, and can cause skin hyperpigmentation. We can protect skin from pollution, but how? What skin care ingredients protect skin from pollution? This blog discusses what pollution does to skin and how to prevent this damage.

Read more
Extracellular Vesicles in Skin Care

By Dr. Leslie Baumann on Oct 01, 2022

Exosomes are a form of extracellular vesicle. So- what is an extracellular vesicle?

Read more
Targeting Cellular Senescence and Skin Aging with Skin Care

By Dr. Leslie Baumann on Sep 24, 2022

Cellular senescence is one of the hallmarks of skin aging and is a skin aging biomarker. What is cellular senescence and can skin care target senescence?

Read more
Fatty Acids in Skin Care

By Dr. Leslie Baumann on Sep 19, 2022

Many ingredients found in moisturizers have fatty acids. Lipids are comprised of fatty acids. The type and amount of fatty acids in moisturizers, especially barrier repair moisturizers, determines their effects. Learn which fatty acids are anti-inflammatory and which help repair the skin barrier.

Read more
Autophagy and Antiaging Skin Care Ingredients

By Dr. Leslie Baumann on Sep 14, 2022

Autophagy is very important to have young skin beautiful skin. What is autophagy, what are the benefits of autophagy and what skin care ingredients increase autophagy?

Read more
Exfoliation vs Desquamation of Skin

By Dr. Leslie Baumann on Aug 08, 2022

The key to glowing skin is desquamation and exfoliation of the epidermis. Exfoliation and desquamation of skin occur when cells from the top outer layer of the skin known as the stratum corneum is removed.

Read more
The Science of Skin Inflammation

By Dr. Leslie Baumann on Jul 14, 2022

The various mechanisms of skin inflammation are discussed. Cytokines, chemokines, free radicals, histamine and kinins.

Read more
Where to Learn Evidence-Based Skin Care Science?

By Dr. Leslie Baumann on Jun 19, 2022

What is Evidence-Based Skincare? The term evidence-based is used by scientists to mean that there is scientific evidence published in peer reviewed high impact research journals to support the use of the skincare treatment. Learn how to know if skincare research is published in a reputable medical publication. Stop believing marketing claims and learn to read medical publications.

Read more
Retinoid Science in Skincare

By Dr. Leslie Baumann on Nov 11, 2021

How do retinoid creams work to treat wrinkles and acne? All retinoids bind the Retinoic Acid Receptor which turns on a cascade of events that prevent skin aging and increase skin collagen. Science lovers will enjoy all the fascinating things we know about how retinoids work to keep your skin looking great.

Read more
Skin Barrier and Causes of A Damaged Skin Barrier

By Dr. Leslie Baumann on Oct 27, 2021

The Skin Barrier is made of skin lipids that surround and protect epidermal skin cells. What does it do and why is it important? How to know if the skin barrier is damaged?

Read more
Layers of Human Skin

By Dr. Leslie Baumann on Aug 30, 2021

How many layers are in human skin? There are 2 main layers of the skin: the epidermis and the dermis. These can be further subdivided into 8 total layers of the skin as seen in the diagrams below. How many layers the skin has depends upon what area of the ...

Read more
Elastin in Skin

By Dr. Leslie Baumann on Sep 10, 2023

This article reviews what elastin fibers are, how to restore them in skin with products, supplements and diet. This blog discusses the differences between collagen and elastin. It also discusses how to measure elastin in skin.

Read more
How Was the Skin Type Quiz Validated?

By Dr. Leslie Baumann on Jul 16, 2023

Only STS and STS Approved Medical Providers have the legal right to use the Baumann Skin Type Quiz and skin care routine builder. Learn how we spent the last 17 years developing and validating this scientific system. It is now the skin type quiz used by dermatologists around the world.

Read more
Understanding Retinol Percentages and Retinoid Strengths

By Dr. Leslie Baumann on Apr 30, 2023

This Retinol Strength Chart will help you understand retinol percentages, compare strengths of retinoids, and find the strongest retinol over the counter and prescription strength retinoids.

Read more
Skin pH and Skin Care Products

By Dr. Leslie Baumann on Apr 01, 2023

What is pH? Does the pH of skin care products matter? What pH to use for different skin conditions.

Read more
Maltese Cross Pattern in Moisturizers

By Dr. Leslie Baumann on Oct 17, 2022

The best barrier repair moisturizers display a maltese cross pattern when viewed under a cross polarized microscope. What is the maltese cross pattern?

Read more
Stem Cells vs Growth Factors vs Exosomes In Skin Care

By Dr. Leslie Baumann on Oct 08, 2022

Guide to the difference between human growth factors, human stem cells and human derived exosomes.

Read more
What Are The Causes of Aging Skin?

By Dr. Leslie Baumann on Oct 07, 2022

Learn about the most recent developments in the science of skin aging. This guide discusses free radicals, matrix metalloproteinases, cellular senescence, autophagy, telomere shortening, and sirtuins.

Read more
Skin Care Ingredients that Protect Skin from Pollution

By Dr. Leslie Baumann on Oct 03, 2022

Pollution ages skin, causes inflammation, and can cause skin hyperpigmentation. We can protect skin from pollution, but how? What skin care ingredients protect skin from pollution? This blog discusses what pollution does to skin and how to prevent this damage.

Read more
Extracellular Vesicles in Skin Care

By Dr. Leslie Baumann on Oct 01, 2022

Exosomes are a form of extracellular vesicle. So- what is an extracellular vesicle?

Read more
Targeting Cellular Senescence and Skin Aging with Skin Care

By Dr. Leslie Baumann on Sep 24, 2022

Cellular senescence is one of the hallmarks of skin aging and is a skin aging biomarker. What is cellular senescence and can skin care target senescence?

Read more
Fatty Acids in Skin Care

By Dr. Leslie Baumann on Sep 19, 2022

Many ingredients found in moisturizers have fatty acids. Lipids are comprised of fatty acids. The type and amount of fatty acids in moisturizers, especially barrier repair moisturizers, determines their effects. Learn which fatty acids are anti-inflammatory and which help repair the skin barrier.

Read more
Autophagy and Antiaging Skin Care Ingredients

By Dr. Leslie Baumann on Sep 14, 2022

Autophagy is very important to have young skin beautiful skin. What is autophagy, what are the benefits of autophagy and what skin care ingredients increase autophagy?

Read more
Exfoliation vs Desquamation of Skin

By Dr. Leslie Baumann on Aug 08, 2022

The key to glowing skin is desquamation and exfoliation of the epidermis. Exfoliation and desquamation of skin occur when cells from the top outer layer of the skin known as the stratum corneum is removed.

Read more
The Science of Skin Inflammation

By Dr. Leslie Baumann on Jul 14, 2022

The various mechanisms of skin inflammation are discussed. Cytokines, chemokines, free radicals, histamine and kinins.

Read more
Where to Learn Evidence-Based Skin Care Science?

By Dr. Leslie Baumann on Jun 19, 2022

What is Evidence-Based Skincare? The term evidence-based is used by scientists to mean that there is scientific evidence published in peer reviewed high impact research journals to support the use of the skincare treatment. Learn how to know if skincare research is published in a reputable medical publication. Stop believing marketing claims and learn to read medical publications.

Read more
Retinoid Science in Skincare

By Dr. Leslie Baumann on Nov 11, 2021

How do retinoid creams work to treat wrinkles and acne? All retinoids bind the Retinoic Acid Receptor which turns on a cascade of events that prevent skin aging and increase skin collagen. Science lovers will enjoy all the fascinating things we know about how retinoids work to keep your skin looking great.

Read more
Skin Barrier and Causes of A Damaged Skin Barrier

By Dr. Leslie Baumann on Oct 27, 2021

The Skin Barrier is made of skin lipids that surround and protect epidermal skin cells. What does it do and why is it important? How to know if the skin barrier is damaged?

Read more
Layers of Human Skin

By Dr. Leslie Baumann on Aug 30, 2021

How many layers are in human skin? There are 2 main layers of the skin: the epidermis and the dermis. These can be further subdivided into 8 total layers of the skin as seen in the diagrams below. How many layers the skin has depends upon what area of the ...

Read more
Elastin in Skin

By Dr. Leslie Baumann on Sep 10, 2023

This article reviews what elastin fibers are, how to restore them in skin with products, supplements and diet. This blog discusses the differences between collagen and elastin. It also discusses how to measure elastin in skin.

Read more
How Was the Skin Type Quiz Validated?

By Dr. Leslie Baumann on Jul 16, 2023

Only STS and STS Approved Medical Providers have the legal right to use the Baumann Skin Type Quiz and skin care routine builder. Learn how we spent the last 17 years developing and validating this scientific system. It is now the skin type quiz used by dermatologists around the world.

Read more
Understanding Retinol Percentages and Retinoid Strengths

By Dr. Leslie Baumann on Apr 30, 2023

This Retinol Strength Chart will help you understand retinol percentages, compare strengths of retinoids, and find the strongest retinol over the counter and prescription strength retinoids.

Read more
Skin pH and Skin Care Products

By Dr. Leslie Baumann on Apr 01, 2023

What is pH? Does the pH of skin care products matter? What pH to use for different skin conditions.

Read more
Maltese Cross Pattern in Moisturizers

By Dr. Leslie Baumann on Oct 17, 2022

The best barrier repair moisturizers display a maltese cross pattern when viewed under a cross polarized microscope. What is the maltese cross pattern?

Read more
Stem Cells vs Growth Factors vs Exosomes In Skin Care

By Dr. Leslie Baumann on Oct 08, 2022

Guide to the difference between human growth factors, human stem cells and human derived exosomes.

Read more
What Are The Causes of Aging Skin?

By Dr. Leslie Baumann on Oct 07, 2022

Learn about the most recent developments in the science of skin aging. This guide discusses free radicals, matrix metalloproteinases, cellular senescence, autophagy, telomere shortening, and sirtuins.

Read more
Skin Care Ingredients that Protect Skin from Pollution

By Dr. Leslie Baumann on Oct 03, 2022

Pollution ages skin, causes inflammation, and can cause skin hyperpigmentation. We can protect skin from pollution, but how? What skin care ingredients protect skin from pollution? This blog discusses what pollution does to skin and how to prevent this damage.

Read more
Extracellular Vesicles in Skin Care

By Dr. Leslie Baumann on Oct 01, 2022

Exosomes are a form of extracellular vesicle. So- what is an extracellular vesicle?

Read more
Targeting Cellular Senescence and Skin Aging with Skin Care

By Dr. Leslie Baumann on Sep 24, 2022

Cellular senescence is one of the hallmarks of skin aging and is a skin aging biomarker. What is cellular senescence and can skin care target senescence?

Read more
Fatty Acids in Skin Care

By Dr. Leslie Baumann on Sep 19, 2022

Many ingredients found in moisturizers have fatty acids. Lipids are comprised of fatty acids. The type and amount of fatty acids in moisturizers, especially barrier repair moisturizers, determines their effects. Learn which fatty acids are anti-inflammatory and which help repair the skin barrier.

Read more
Autophagy and Antiaging Skin Care Ingredients

By Dr. Leslie Baumann on Sep 14, 2022

Autophagy is very important to have young skin beautiful skin. What is autophagy, what are the benefits of autophagy and what skin care ingredients increase autophagy?

Read more
Exfoliation vs Desquamation of Skin

By Dr. Leslie Baumann on Aug 08, 2022

The key to glowing skin is desquamation and exfoliation of the epidermis. Exfoliation and desquamation of skin occur when cells from the top outer layer of the skin known as the stratum corneum is removed.

Read more
The Science of Skin Inflammation

By Dr. Leslie Baumann on Jul 14, 2022

The various mechanisms of skin inflammation are discussed. Cytokines, chemokines, free radicals, histamine and kinins.

Read more
Where to Learn Evidence-Based Skin Care Science?

By Dr. Leslie Baumann on Jun 19, 2022

What is Evidence-Based Skincare? The term evidence-based is used by scientists to mean that there is scientific evidence published in peer reviewed high impact research journals to support the use of the skincare treatment. Learn how to know if skincare research is published in a reputable medical publication. Stop believing marketing claims and learn to read medical publications.

Read more
Retinoid Science in Skincare

By Dr. Leslie Baumann on Nov 11, 2021

How do retinoid creams work to treat wrinkles and acne? All retinoids bind the Retinoic Acid Receptor which turns on a cascade of events that prevent skin aging and increase skin collagen. Science lovers will enjoy all the fascinating things we know about how retinoids work to keep your skin looking great.

Read more
Skin Barrier and Causes of A Damaged Skin Barrier

By Dr. Leslie Baumann on Oct 27, 2021

The Skin Barrier is made of skin lipids that surround and protect epidermal skin cells. What does it do and why is it important? How to know if the skin barrier is damaged?

Read more
Layers of Human Skin

By Dr. Leslie Baumann on Aug 30, 2021

How many layers are in human skin? There are 2 main layers of the skin: the epidermis and the dermis. These can be further subdivided into 8 total layers of the skin as seen in the diagrams below. How many layers the skin has depends upon what area of the ...

Read more
Elastin in Skin

By Dr. Leslie Baumann on Sep 10, 2023

This article reviews what elastin fibers are, how to restore them in skin with products, supplements and diet. This blog discusses the differences between collagen and elastin. It also discusses how to measure elastin in skin.

Read more
How Was the Skin Type Quiz Validated?

By Dr. Leslie Baumann on Jul 16, 2023

Only STS and STS Approved Medical Providers have the legal right to use the Baumann Skin Type Quiz and skin care routine builder. Learn how we spent the last 17 years developing and validating this scientific system. It is now the skin type quiz used by dermatologists around the world.

Read more
Understanding Retinol Percentages and Retinoid Strengths

By Dr. Leslie Baumann on Apr 30, 2023

This Retinol Strength Chart will help you understand retinol percentages, compare strengths of retinoids, and find the strongest retinol over the counter and prescription strength retinoids.

Read more
Skin pH and Skin Care Products

By Dr. Leslie Baumann on Apr 01, 2023

What is pH? Does the pH of skin care products matter? What pH to use for different skin conditions.

Read more
Maltese Cross Pattern in Moisturizers

By Dr. Leslie Baumann on Oct 17, 2022

The best barrier repair moisturizers display a maltese cross pattern when viewed under a cross polarized microscope. What is the maltese cross pattern?

Read more
Stem Cells vs Growth Factors vs Exosomes In Skin Care

By Dr. Leslie Baumann on Oct 08, 2022

Guide to the difference between human growth factors, human stem cells and human derived exosomes.

Read more
What Are The Causes of Aging Skin?

By Dr. Leslie Baumann on Oct 07, 2022

Learn about the most recent developments in the science of skin aging. This guide discusses free radicals, matrix metalloproteinases, cellular senescence, autophagy, telomere shortening, and sirtuins.

Read more
Skin Care Ingredients that Protect Skin from Pollution

By Dr. Leslie Baumann on Oct 03, 2022

Pollution ages skin, causes inflammation, and can cause skin hyperpigmentation. We can protect skin from pollution, but how? What skin care ingredients protect skin from pollution? This blog discusses what pollution does to skin and how to prevent this damage.

Read more
Extracellular Vesicles in Skin Care

By Dr. Leslie Baumann on Oct 01, 2022

Exosomes are a form of extracellular vesicle. So- what is an extracellular vesicle?

Read more
Targeting Cellular Senescence and Skin Aging with Skin Care

By Dr. Leslie Baumann on Sep 24, 2022

Cellular senescence is one of the hallmarks of skin aging and is a skin aging biomarker. What is cellular senescence and can skin care target senescence?

Read more
Fatty Acids in Skin Care

By Dr. Leslie Baumann on Sep 19, 2022

Many ingredients found in moisturizers have fatty acids. Lipids are comprised of fatty acids. The type and amount of fatty acids in moisturizers, especially barrier repair moisturizers, determines their effects. Learn which fatty acids are anti-inflammatory and which help repair the skin barrier.

Read more
Autophagy and Antiaging Skin Care Ingredients

By Dr. Leslie Baumann on Sep 14, 2022

Autophagy is very important to have young skin beautiful skin. What is autophagy, what are the benefits of autophagy and what skin care ingredients increase autophagy?

Read more
Exfoliation vs Desquamation of Skin

By Dr. Leslie Baumann on Aug 08, 2022

The key to glowing skin is desquamation and exfoliation of the epidermis. Exfoliation and desquamation of skin occur when cells from the top outer layer of the skin known as the stratum corneum is removed.

Read more
The Science of Skin Inflammation

By Dr. Leslie Baumann on Jul 14, 2022

The various mechanisms of skin inflammation are discussed. Cytokines, chemokines, free radicals, histamine and kinins.

Read more
Where to Learn Evidence-Based Skin Care Science?

By Dr. Leslie Baumann on Jun 19, 2022

What is Evidence-Based Skincare? The term evidence-based is used by scientists to mean that there is scientific evidence published in peer reviewed high impact research journals to support the use of the skincare treatment. Learn how to know if skincare research is published in a reputable medical publication. Stop believing marketing claims and learn to read medical publications.

Read more
Retinoid Science in Skincare

By Dr. Leslie Baumann on Nov 11, 2021

How do retinoid creams work to treat wrinkles and acne? All retinoids bind the Retinoic Acid Receptor which turns on a cascade of events that prevent skin aging and increase skin collagen. Science lovers will enjoy all the fascinating things we know about how retinoids work to keep your skin looking great.

Read more
Skin Barrier and Causes of A Damaged Skin Barrier

By Dr. Leslie Baumann on Oct 27, 2021

The Skin Barrier is made of skin lipids that surround and protect epidermal skin cells. What does it do and why is it important? How to know if the skin barrier is damaged?

Read more
Layers of Human Skin

By Dr. Leslie Baumann on Aug 30, 2021

How many layers are in human skin? There are 2 main layers of the skin: the epidermis and the dermis. These can be further subdivided into 8 total layers of the skin as seen in the diagrams below. How many layers the skin has depends upon what area of the ...

Read more
Elastin in Skin

By Dr. Leslie Baumann on Sep 10, 2023

This article reviews what elastin fibers are, how to restore them in skin with products, supplements and diet. This blog discusses the differences between collagen and elastin. It also discusses how to measure elastin in skin.

Read more
How Was the Skin Type Quiz Validated?

By Dr. Leslie Baumann on Jul 16, 2023

Only STS and STS Approved Medical Providers have the legal right to use the Baumann Skin Type Quiz and skin care routine builder. Learn how we spent the last 17 years developing and validating this scientific system. It is now the skin type quiz used by dermatologists around the world.

Read more
Understanding Retinol Percentages and Retinoid Strengths

By Dr. Leslie Baumann on Apr 30, 2023

This Retinol Strength Chart will help you understand retinol percentages, compare strengths of retinoids, and find the strongest retinol over the counter and prescription strength retinoids.

Read more
Skin pH and Skin Care Products

By Dr. Leslie Baumann on Apr 01, 2023

What is pH? Does the pH of skin care products matter? What pH to use for different skin conditions.

Read more
Maltese Cross Pattern in Moisturizers

By Dr. Leslie Baumann on Oct 17, 2022

The best barrier repair moisturizers display a maltese cross pattern when viewed under a cross polarized microscope. What is the maltese cross pattern?

Read more
Stem Cells vs Growth Factors vs Exosomes In Skin Care

By Dr. Leslie Baumann on Oct 08, 2022

Guide to the difference between human growth factors, human stem cells and human derived exosomes.

Read more
What Are The Causes of Aging Skin?

By Dr. Leslie Baumann on Oct 07, 2022

Learn about the most recent developments in the science of skin aging. This guide discusses free radicals, matrix metalloproteinases, cellular senescence, autophagy, telomere shortening, and sirtuins.

Read more
Skin Care Ingredients that Protect Skin from Pollution

By Dr. Leslie Baumann on Oct 03, 2022

Pollution ages skin, causes inflammation, and can cause skin hyperpigmentation. We can protect skin from pollution, but how? What skin care ingredients protect skin from pollution? This blog discusses what pollution does to skin and how to prevent this damage.

Read more
Extracellular Vesicles in Skin Care

By Dr. Leslie Baumann on Oct 01, 2022

Exosomes are a form of extracellular vesicle. So- what is an extracellular vesicle?

Read more
Targeting Cellular Senescence and Skin Aging with Skin Care

By Dr. Leslie Baumann on Sep 24, 2022

Cellular senescence is one of the hallmarks of skin aging and is a skin aging biomarker. What is cellular senescence and can skin care target senescence?

Read more
Fatty Acids in Skin Care

By Dr. Leslie Baumann on Sep 19, 2022

Many ingredients found in moisturizers have fatty acids. Lipids are comprised of fatty acids. The type and amount of fatty acids in moisturizers, especially barrier repair moisturizers, determines their effects. Learn which fatty acids are anti-inflammatory and which help repair the skin barrier.

Read more
Autophagy and Antiaging Skin Care Ingredients

By Dr. Leslie Baumann on Sep 14, 2022

Autophagy is very important to have young skin beautiful skin. What is autophagy, what are the benefits of autophagy and what skin care ingredients increase autophagy?

Read more
Exfoliation vs Desquamation of Skin

By Dr. Leslie Baumann on Aug 08, 2022

The key to glowing skin is desquamation and exfoliation of the epidermis. Exfoliation and desquamation of skin occur when cells from the top outer layer of the skin known as the stratum corneum is removed.

Read more
The Science of Skin Inflammation

By Dr. Leslie Baumann on Jul 14, 2022

The various mechanisms of skin inflammation are discussed. Cytokines, chemokines, free radicals, histamine and kinins.

Read more
Where to Learn Evidence-Based Skin Care Science?

By Dr. Leslie Baumann on Jun 19, 2022

What is Evidence-Based Skincare? The term evidence-based is used by scientists to mean that there is scientific evidence published in peer reviewed high impact research journals to support the use of the skincare treatment. Learn how to know if skincare research is published in a reputable medical publication. Stop believing marketing claims and learn to read medical publications.

Read more
Retinoid Science in Skincare

By Dr. Leslie Baumann on Nov 11, 2021

How do retinoid creams work to treat wrinkles and acne? All retinoids bind the Retinoic Acid Receptor which turns on a cascade of events that prevent skin aging and increase skin collagen. Science lovers will enjoy all the fascinating things we know about how retinoids work to keep your skin looking great.

Read more
Skin Barrier and Causes of A Damaged Skin Barrier

By Dr. Leslie Baumann on Oct 27, 2021

The Skin Barrier is made of skin lipids that surround and protect epidermal skin cells. What does it do and why is it important? How to know if the skin barrier is damaged?

Read more
Layers of Human Skin

By Dr. Leslie Baumann on Aug 30, 2021

How many layers are in human skin? There are 2 main layers of the skin: the epidermis and the dermis. These can be further subdivided into 8 total layers of the skin as seen in the diagrams below. How many layers the skin has depends upon what area of the ...

Read more
Elastin in Skin

By Dr. Leslie Baumann on Sep 10, 2023

This article reviews what elastin fibers are, how to restore them in skin with products, supplements and diet. This blog discusses the differences between collagen and elastin. It also discusses how to measure elastin in skin.

Read more
How Was the Skin Type Quiz Validated?

By Dr. Leslie Baumann on Jul 16, 2023

Only STS and STS Approved Medical Providers have the legal right to use the Baumann Skin Type Quiz and skin care routine builder. Learn how we spent the last 17 years developing and validating this scientific system. It is now the skin type quiz used by dermatologists around the world.

Read more
Understanding Retinol Percentages and Retinoid Strengths

By Dr. Leslie Baumann on Apr 30, 2023

This Retinol Strength Chart will help you understand retinol percentages, compare strengths of retinoids, and find the strongest retinol over the counter and prescription strength retinoids.

Read more
Skin pH and Skin Care Products

By Dr. Leslie Baumann on Apr 01, 2023

What is pH? Does the pH of skin care products matter? What pH to use for different skin conditions.

Read more
Maltese Cross Pattern in Moisturizers

By Dr. Leslie Baumann on Oct 17, 2022

The best barrier repair moisturizers display a maltese cross pattern when viewed under a cross polarized microscope. What is the maltese cross pattern?

Read more
Stem Cells vs Growth Factors vs Exosomes In Skin Care

By Dr. Leslie Baumann on Oct 08, 2022

Guide to the difference between human growth factors, human stem cells and human derived exosomes.

Read more
What Are The Causes of Aging Skin?

By Dr. Leslie Baumann on Oct 07, 2022

Learn about the most recent developments in the science of skin aging. This guide discusses free radicals, matrix metalloproteinases, cellular senescence, autophagy, telomere shortening, and sirtuins.

Read more
Skin Care Ingredients that Protect Skin from Pollution

By Dr. Leslie Baumann on Oct 03, 2022

Pollution ages skin, causes inflammation, and can cause skin hyperpigmentation. We can protect skin from pollution, but how? What skin care ingredients protect skin from pollution? This blog discusses what pollution does to skin and how to prevent this damage.

Read more
Extracellular Vesicles in Skin Care

By Dr. Leslie Baumann on Oct 01, 2022

Exosomes are a form of extracellular vesicle. So- what is an extracellular vesicle?

Read more
Targeting Cellular Senescence and Skin Aging with Skin Care

By Dr. Leslie Baumann on Sep 24, 2022

Cellular senescence is one of the hallmarks of skin aging and is a skin aging biomarker. What is cellular senescence and can skin care target senescence?

Read more
Fatty Acids in Skin Care

By Dr. Leslie Baumann on Sep 19, 2022

Many ingredients found in moisturizers have fatty acids. Lipids are comprised of fatty acids. The type and amount of fatty acids in moisturizers, especially barrier repair moisturizers, determines their effects. Learn which fatty acids are anti-inflammatory and which help repair the skin barrier.

Read more
Autophagy and Antiaging Skin Care Ingredients

By Dr. Leslie Baumann on Sep 14, 2022

Autophagy is very important to have young skin beautiful skin. What is autophagy, what are the benefits of autophagy and what skin care ingredients increase autophagy?

Read more
Exfoliation vs Desquamation of Skin

By Dr. Leslie Baumann on Aug 08, 2022

The key to glowing skin is desquamation and exfoliation of the epidermis. Exfoliation and desquamation of skin occur when cells from the top outer layer of the skin known as the stratum corneum is removed.