A botanical extract derived from the leaves of the Camellia sinensis plant, rich in polyphenols including EGCG. The CIR Expert Panel (2014) concluded it is safe when formulated to be nonsensitizing — based on reviewed use data showing concentrations up to 0.86% in leave-on and 1% in rinse-off products (these are CIR-assessed use conditions, not regulatory limits). Sensitization was the Panel's primary concern: catechins were sensitizing in animal studies at higher concentrations. Reported in 1,865 FDA VCRP product entries; our database tracks 7,799 product variants containing this ingredient.
A botanical antioxidant extracted from Camellia sinensis leaves that provides polyphenol-based skin conditioning benefits. The CIR Expert Panel reviewed this ingredient in 2014 and concluded it is safe with qualifications — specifically, it must be formulated to be nonsensitizing. The Panel based its conclusion on use data showing concentrations up to 0.86% in leave-on and 1% in rinse-off products; these represent the CIR-assessed use conditions at the time of review, not formal regulatory limits. This qualified conclusion reflects the fact that catechins (particularly EGCG) were found to be sensitizing in guinea pig studies at 5% concentration, although human patch tests at 0.86% showed no sensitization.
Camellia sinensis (CAS No. 84650-60-2) is native to East, South, and Southeast Asia and is the plant from which all true teas are derived — white, green, oolong, and black tea differ based on harvesting time, leaf age, and processing. The type of tea used for cosmetic ingredients is not always specified. The leaves contain flavanols (25% dry weight), proteins (15%), polysaccharides (13%), and other constituents including caffeine, theanine, and linalool (6–1,984 ppm). EGCG (epigallocatechin gallate) is considered the predominant catechin in green tea extracts, though its actual proportion varies depending on tea variety, harvest conditions, and extraction method.
Per FDA VCRP data, Camellia Sinensis Leaf Extract is used in 1,083 leave-on, 747 rinse-off, and 35 bath cosmetic products. Industry-reported maximum concentrations are 2% in leave-on products (body and hand products) and 1% in rinse-off products (bath soaps and detergents). The CIR Panel's 2014 assessment accepted use conditions up to 0.86% in leave-on products based on available sensitization data — this is not a regulatory upper limit but rather the concentration range supported by the human safety data (HRIPT) available at the time. The FDA considers tea (Thea sinensis) a GRAS substance for food use. CosIng lists additional functions beyond antioxidant and skin conditioning, including cosmetic astringent, antimicrobial, light stabilizer, and skin protectant.
Green tea polyphenols, particularly EGCG, have demonstrated antioxidant activity in laboratory studies. These compounds may help neutralize free radicals generated by UV exposure and environmental stressors, though the degree of benefit depends on concentration and formulation stability.
One human study (n=20) found that green tea extract at 2–5% in a specific sunscreen formulation reduced UV-induced photoaging markers, with the 3% concentration showing the most favorable results in that study. These findings are from a single study with a small sample; efficacy depends heavily on formulation stability, solvent system, and product type. Green tea extract is not a sunscreen itself.
Listed by CosIng as a skin conditioning agent. The polyphenol content may help improve skin texture and appearance. Some in vitro studies suggest anti-inflammatory properties, though clinical evidence for topical application at cosmetic concentrations is limited.
CosIng lists antimicrobial and antifungal functions. Catechins have shown antimicrobial activity in laboratory settings. However, at typical cosmetic concentrations (below 0.86%), the practical antimicrobial contribution is likely minimal.
Generally suitable for: Most skin types at recommended concentrations. Individuals with known sensitivity to tea-derived ingredients or catechins should patch test first.
The CIR Expert Panel (June 2014) concluded that Camellia sinensis leaf extract is safe when formulated to be nonsensitizing, based on reviewed use data up to 0.86% in leave-on and 1% in rinse-off products. This is a qualified conclusion — sensitization was the Panel's primary concern, as catechins (EGCG) were sensitizing in animal studies at higher concentrations. At typical cosmetic concentrations the sensitization risk appears low, but it is not zero — particularly for high-catechin or high-EGCG formulations.
The CIR Panel's "safe with qualifications" conclusion means this ingredient requires careful formulation. The key concern is sensitization: EGCG was sensitizing in guinea pigs at concentrations as low as 0.1% in a maximization test. At typical cosmetic concentrations, the sensitization risk appears low but is not zero — particularly for formulations with high catechin or EGCG content. The 0.86% / 1% figures represent the CIR-assessed use conditions based on data available in 2014, not formal regulatory upper limits.
Green tea extract contains linalool (6–1,984 ppm in leaves), a known dermal sensitizer. The CIR Panel noted that products combining multiple botanical ingredients containing linalool should ensure total linalool exposure stays below levels of toxicological concern.
Green tea extract was mutagenic in an Ames test (with S9 activation), but consistently non-mutagenic in vivo. Quercetin, another constituent (760–10,000 ppm in leaves), also showed positive in vitro genotoxicity but was negative in oral in vivo studies.
The CIR Panel noted that pesticide residues, heavy metals, and aflatoxins may be present in botanical ingredients. They stressed that manufacturers should use current good manufacturing practices (cGMPs) to limit impurities.
The CIR report (2014) did not specifically address reproductive or developmental toxicity for Camellia sinensis leaf extract, as the Panel focused on irritation and sensitization. However, the NTP 14-week oral sub-study noted reproductive toxicity signals at high doses: decreased spermatid counts in male rats and altered estrous cycles in female rats. The 2-year oral study (100–1,000 mg/kg by gavage) found non-neoplastic organ lesions in multiple organs. These are high-dose oral findings and cannot be directly extrapolated to topical cosmetic use at concentrations below 1%. The ingredient contains caffeine (dried leaves contain ≥2% caffeine by dry weight), though topical absorption at typical cosmetic concentrations is minimal. Consult your healthcare provider for personal advice.
Green tea polyphenols are sensitive to oxidation and light. Look for products in opaque, airtight packaging. Serums and essences tend to deliver higher concentrations than moisturizers. The CIR Panel accepted use conditions up to 0.86% for leave-on products based on available safety data.
Apply green tea serum or essence to clean, slightly damp skin. This allows better absorption. Follow with moisturizer and sunscreen during the day.
Some research suggests green tea extract may complement sunscreen by providing additional antioxidant support, though the degree of benefit depends on formulation stability and concentration. Apply under or alongside SPF products during daytime use.
Concentrated delivery with lighter texture. Suitable for layering under other products.
Combined with emollients for hydration plus antioxidant benefits. Good for daily routine.
CIR-assessed use conditions include up to 1% in rinse-off products. Brief skin contact limits active ingredient exposure.
Both are antioxidants that may complement each other. Vitamin C targets brightening and collagen synthesis while green tea provides broad polyphenol-based protection.
Niacinamide supports barrier function and may help with uneven skin tone. No known conflicts with green tea extract. Complementary mechanisms.
Hyaluronic acid provides hydration while green tea provides antioxidant conditioning. Well-suited for layering in the same routine.
One study (n=20) found green tea extract at 2–5% in a sunscreen formulation reduced UV-induced photoaging markers. A potentially complementary pairing for daytime use, though efficacy depends on formulation stability.
Green tea contains linalool (a known sensitizer). Combining with other botanicals that also contain linalool could push total exposure above safe levels. Be mindful of ingredient stacking.
Strong AHA/BHA peels may increase skin permeability. Using green tea extract on recently exfoliated skin could theoretically increase sensitization risk, though no specific data exist.
Found in 7,799 product variants in the SkinSenseDiary database (separately, the FDA VCRP lists 1,865 cosmetic product entries). Here are some well-known options:
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