Green tea extract is a natural ingredient derived from the leaves of the Camellia sinensis plant, obtained through solvent extraction and concentration processes. Its key active components include polyphenols (especially catechins like EGCG), flavonoids, and caffeine, which contribute to its diverse biological activities .

Renowned for its potent antioxidant properties, the extract can scavenge free radicals and reduce oxidative stress, with its antioxidant capacity surpassing that of vitamins C and E . In the food industry, it serves as a natural preservative and antioxidant, extending the shelf life of oils, meat products, and beverages while maintaining product quality .

In skincare and cosmetics, it acts as an anti-aging and soothing agent. It helps slow down skin aging caused by free radical damage, soothes irritation from other ingredients, and even aids in reducing cellulite by supporting fat release . Additionally, it exhibits antimicrobial effects, inhibiting the growth of harmful bacteria like Staphylococcus aureus and oral bacteria that cause tooth decay .