Green tea (Camellia sinensis) has gained attention in both traditional and modern contexts for its potential benefits in supporting acne treatment, but there is now a moderate level of scientific evidence to support its use. Green tea contains polyphenols, particularly epigallocatechin-3-gallate (EGCG), which possess anti-inflammatory, antioxidant, and antimicrobial properties. These characteristics are relevant to acne, a condition marked by inflammation, excess sebum production, and bacterial overgrowth (especially Cutibacterium acnes).

Several small clinical studies and in vitro experiments have explored the effects of green tea extracts on acne. Topical application of green tea formulations has been shown to reduce sebum production, decrease the number of inflammatory lesions, and inhibit bacterial growth. For example, a randomized controlled trial found that a 2% green tea lotion reduced acne lesions significantly over eight weeks compared to placebo. Other studies have reported improvements in skin appearance and reduced markers of inflammation with both oral and topical green tea administration.

While the evidence is promising, it is not yet robust due to the limited number of large-scale, high-quality clinical trials. Most studies have small sample sizes and variable formulations, making direct comparisons difficult. Nevertheless, green tea is commonly included in over-the-counter acne products and is generally considered safe for topical use. Thus, the scientific support for green tea in acne management is moderate, meriting further research.