Does Black Tea Help Hair Growth? What Mouse Studies Show
Short answer: Topical fermented black-tea extract produced hair-related changes in a mouse experiment. This is preclinical evidence and does not prove that drinking tea or applying black-tea extract regrows human hair.
How was the mouse study designed?
Researchers applied fermented black-tea extract to shaved male mice and evaluated visible hair growth and skin or follicle measures. The model can identify a possible biological signal, but it does not reproduce human androgenetic alopecia.
What does the study not show?
It does not establish a safe human formulation, an effective dose, durability, comparative effectiveness or benefit from oral black tea. Mouse coat regrowth and human scalp-hair miniaturization are different outcomes.
How does this page differ from the DHT review?
This page is limited to the topical mouse hair-growth experiment. The separate DHT review covers theaflavin effects in enzyme preparations, prostate cells and a mouse prostate model.
Related research
Read Does Black Tea Block DHT? What Theaflavin Studies Show.