From Anirva. This article is general information, not medical advice. These statements have not been evaluated by the Food and Drug Administration. This article is not intended to diagnose, treat, cure, or prevent any disease.
Green tea extract, and specifically a compound called EGCG, has drawn research interest for its antioxidant properties. Some of that research has looked at UV-exposed skin cells. Here's what it actually shows — and why it's not a substitute for sunscreen.
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Key Takeaways
- UV exposure is a well-documented contributor to premature skin aging and a risk factor for skin cancer.
- Green tea extract (particularly EGCG) has been studied in laboratory and some early human research for its antioxidant and anti-inflammatory properties.
- This research does not show that green tea extract prevents, treats, or "clears" sunburn or reduces skin cancer risk in people.
- Sunscreen, protective clothing, and limiting peak-sun exposure remain the proven ways to protect skin.
How the Sun Affects Skin
The sun is something of a double-edged sword. It supports the body's production of vitamin D, but excessive UV exposure is a well-established contributor to premature skin aging and is a risk factor for skin cancer.
The sun emits ultraviolet rays in the form of Long Wave Ultraviolet (UVA) and Short Wave Ultraviolet (UVB). UVA penetrates the dermis — the skin's thickest layer — and is linked to photoaging and wrinkling (1). UVA rays can also pass through cloud cover and glass. UVB rays affect the skin's outer, superficial layers and are the primary cause of sunburn and skin reddening. UVB exposure is also a well-documented risk factor for skin cancer.
What Is Green Tea Extract?
There's ongoing research interest in naturally occurring compounds that may support skin health alongside proven UV protection measures like sunscreen. One compound researchers have studied is green tea extract.
Green tea contains water-extractable polyphenols called catechins, a type of flavonoid. The main catechin studied is epigallocatechin gallate (EGCG), alongside epicatechin (EC) and epicatechin gallate (ECG). Researchers have studied green tea's antioxidant and anti-inflammatory properties, including some laboratory and early human research on whether green tea extract — taken orally or applied topically — may support skin's response to UV exposure (2).
Research on Visible Signs of Skin Aging
Some research has looked at green tea extract in connection with visible signs of skin aging, such as wrinkling, loss of elasticity, and skin thinning. Compounds in green tea extract, including EGCG, have been studied for a possible role in supporting skin cell resilience and collagen levels in laboratory research (3). Collagen is the skin's main structural protein, playing a role in skin strength and elasticity.
Some early research has also explored whether green tea extract may help support skin's appearance after UV exposure. This research is still developing, and claims that it can "clear" or "repair" UV damage go beyond what current evidence supports.
UV, DNA Damage, and Skin Cancer Risk
UV radiation is a known contributor to DNA damage in skin cells, which plays a role in the development of skin cancers including melanoma, squamous cell carcinoma, and basal cell carcinoma, as well as precancerous conditions like actinic keratosis. This is one of the key reasons dermatologists recommend daily sunscreen and regular skin checks.
Some laboratory research has examined whether compounds in green tea extract, including EGCG, interact with markers of oxidative stress and inflammation in skin cells following UV exposure (4). This research is preclinical and does not establish that green tea extract prevents, treats, or reduces the risk of skin cancer in humans.
What the Research Does Not Yet Show
Research on green tea extract and skin health is ongoing and still developing. As with most botanical compounds, more human clinical research is needed before firm conclusions can be drawn about its role in skin health. Green tea extract is not a substitute for sunscreen or professional dermatological care.
Frequently Asked Questions
Can green tea extract prevent sunburn?
Does green tea extract reduce skin cancer risk?
Should I take green tea extract instead of using sunscreen?
References
- D'Orazio J, et al. UV radiation and the skin. Int J Mol Sci. 2013. PMCID: PMC3709783.
- Katiyar SK, et al. Green tea polyphenols and skin. PMCID: PMC3390139.
- Kim E, et al. Green tea catechins and skin collagen. PMID: 19624431.
- Katiyar SK. Skin photoprotection by green tea: antioxidant and immunomodulatory effects. PMCID: PMC3077767.
