Green Tea in Skin Care
Green tea is a powerful antioxidant and used to treat skin aging, acne, rosacea, eczema, psoriasis, and sensitive skin. Its anti-inflammatory properties make it useful in skincare regimens designed to lighten skin and in rosacea treatment creams. Green tea has antioxidant, anti-aging, anti-acne, anticarcinogenic, anti-inflammatory, skin lightening, and photoprotective properties that make it one of the best antioxidants for skin.  
Green tea is one of the best ingredients to treat skin inflammation.
Green Tea is recommended for the following Baumann Skin Types:
DRNW, DRPW, DSNT, DSPT, DSNW, DSPW,
ORNW, ORPW, OSNT, OSPT, OSNW, OSPW
Source of Green Tea in Skin Care:
Derived from an evergreen tree Camellia sinensis in the Theaceae family. Organic forms are available.
Chemistry of Green Tea in Skin Care Products:
The four major polyphenolic catechins found in green tea include: ECG [(-)EpiCatechin-3-O-Gallate], GCG [(-)GalloCatechin-3-O-Gallate], EGC [(-)EpiGalloCatechin], and EGCG [(-)EpiGalloCatechin-3-O-Gallate], the most abundant and biologically active green tea constituent.
Safety Issues and Clean Ingredient Standards for Green Tea
Green tea and green tea extracts are generally recognized as safe (GRAS). There are no clean ingredient standards that exclude green tea extract.
Environmental Impact of Green Tea in Skin Care
Cultivating green tea does not harm the environment. The sustainability of tea plantations may be challenged or threatened by global climate change..
Product Formulation Considerations
Green tea is challenging to formulate because it is unstable. EGCG is the component of green tea that should be used in formulations because it has the most antioxidant activity. However, EGCG is also the most expensive form of green tea in cosmetics.
When a large amount of green tea is put in a skincare product, it may look turn brown. (In this case- brown is good because it means there is enough green tea in the product.) Green tea is relatively easy to combine with other ingredients because it does not easily react with other ingredients and seems to facilitate or support their stability.
Skin Care Routine Design Considerations
The hydrophilic nature of EGCG limits penetration into human skin. Green tea should be used with ingredients that increase skin penetration when possible such as hyaluronic acid and oleic acid. When designing a skin care routine, care should be taken to design the order of steps in the routine to increase absorption of green tea.
 Bauman L. Green Tea in Cosmeceuticals and Cosmetic Ingredients. (McGraw Hill 2014)
 Baumann L. In Ch 389 Antioxidants in Baumann’s Cosmetic Dermatology (McGraw Hill 2022)
 Wijeratne MA, Anandacoomaraswamy A, Amarathunga MSKLD, et al. Assessment of impact of climate change on productivity of tea (Camellia sinensis L.) plantations in Sri Lanka. J Natn Sci Foundation Sri Lanka. 35:119, 2007.
Green tea plant image: Pro QueeNia, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons