Green tea
Antioxidant: reduces oxidative stress and calms skin.
What the evidence says
Human evidence for its polyphenols (EGCG) against UV damage.
How to use it
Morning makes the most sense: as an antioxidant it complements sunscreen against UV and pollution damage. Night works too, for soothing. Look for formulas that specify EGCG or polyphenols, not just "green tea extract" at the end of the INCI.
What it pairs with
With vitamins C and E (antioxidant network), niacinamide and sunscreen. No known incompatibilities.
Frequently asked questions
What is EGCG and why does it matter?
Epigallocatechin gallate is green tea's most active polyphenol, and it's where the evidence sits: human studies show it reduces UV-induced damage and redness. A generic "green tea extract" may contain very little; the active fraction is what counts.
Does green tea help oily skin?
Small studies suggest a modest sebum reduction, and its soothing action suits reactive oily skin. But if oil or acne is your main goal, niacinamide and BHA have more evidence behind them.
