Randomized controlled trials found that 2% topical green tea lotion significantly reduced acne lesion counts over 8 weeks. In vitro assays confirmed inhibitory activity of EGCG against Cutibacterium acnes and Staphylococcus aureus, supporting its role in acne management.

Anti-inflammatory Action 

Both in vitro and clinical studies report that green tea polyphenols downregulate pro-inflammatory mediators such as COX-2, IL-8, and TNF-α. Topical application reduced redness and irritation in acne and rosacea patients, confirming its soothing effect on sensitive skin.

Antioxidant & Photoprotective Effects

In vitro and in vivo studies show that EGCG and other green tea catechins scavenge reactive oxygen species (ROS) and protect keratinocytes from UV-induced DNA damage. Clinical trials demonstrated reduced erythema and oxidative stress markers after UV exposure in subjects treated with green tea formulations.

Applications in Skin Care Products

• • Anti-aging creams and serums: To inhibit collagen breakdown, reduce wrinkles, and improve skin firmness.
  • Acne treatments: Leveraging antimicrobial and anti-inflammatory actions to reduce breakouts and sebum.
  • Brightening formulations: To protect against oxidative stress, minimize pigmentation, and even skin tone.
  • Moisturizers and masks: For soothing irritation, calming sensitive skin, and enhancing hydration.
  • Sun care products: As a natural antioxidant and photoprotective booster alongside UV filters.
  • Healing gels and ointments: To support skin regeneration, accelerate repair, and reduce redness.
  
  
  Conclusion

  Green tea extract is a proven multifunctional skincare ingredient. Its catechins, especially EGCG, deliver antioxidant, anti-inflammatory, antimicrobial, and photoprotectiive benefits, helping protect skin, reduce acne, slow aging, and support regeneration.

  
  

  References

  Elsaie M.L. et al. Topical green tea lotion for the treatment of acne vulgaris: a clinical evaluation. J Drugs Dermatol. 2009;8(5):468-72. PMID: 19363854

  
  

  Katiyar S.K., Mukhtar H. Green tea polyphenol (-)-epigallocatechin-3-gallate treatment of human skin inhibits ultraviolet radiation–induced oxidative stress. Carcinogenesis. 2001;22(2):287-94. PMID: 11181450

  
  

  Rhodes L.E. et al. Randomized controlled trial of green tea catechins in protection against ultraviolet radiation–induced cutaneous inflammation. Am J Clin Nutr. 2013;98(6):1585-91. PMID: 24172346 / https://pubmed.ncbi.nlm.nih.gov/26178731/