Green Tea (EGCG)

Potent antioxidant polyphenol that neutralizes free radicals and inflammation.

Also known as: EGCG (epigallocatechin gallate), Camellia sinensis extract, green tea polyphenols, catechins.

What it is

EGCG is the most abundant and bioactive catechin polyphenol found in green tea leaves. It's a plant-derived antioxidant that crosses the skin barrier and accumulates in dermal tissue.

What it does

EGCG scavenges free radicals and reduces oxidative stress, which slows collagen breakdown and supports skin barrier function. It also has mild anti-inflammatory and antimicrobial properties, making it useful for calming irritation and supporting acne-prone skin. Studies show it can reduce sebum production and improve skin texture over time.

The evidence

Strong clinical evidence supports EGCG's antioxidant and anti-inflammatory effects in topical skincare; multiple randomized controlled trials confirm benefits for photoaging, acne, and sebum control. Evidence for significant collagen synthesis is moderate.

Best for

All skin types, especially oily, acne-prone, and sun-damaged skin; also beneficial for sensitive and aging skin seeking antioxidant protection.

Pairs well with

Vitamin C, niacinamide, hyaluronic acid, resveratrol, and other antioxidants; works synergistically with SPF for photoprotection.

Use cautiously with

No major conflicts. Can be used alongside most actives; avoid excessive heat during formulation as EGCG degrades above 60°C.

Cautions

Generally well-tolerated; rare sensitization in very sensitive skin. Formulations must be stabilized (pH 3–5, antioxidant co-factors) to prevent oxidation and loss of potency.