Does Black Tea Block DHT? What Theaflavin Studies Show
Short answer: Theaflavins have affected 5-alpha-reductase and androgen-related measures in laboratory and mouse research. No cited clinical trial shows that drinking black tea or taking theaflavin extract lowers scalp DHT or regrows hair in people.
What did the theaflavin mechanism study find?
A study of rat-liver microsomes and LNCaP prostate-cancer cells reported that theaflavin-3,3′-digallate inhibited 5-alpha-reductase activity and affected androgen-receptor-related measures. These models were not human scalp follicles.
Read the theaflavin mechanism study.
What did the mouse DHT study find?
A separate prostate-tumor experiment in mice compared black-tea and green-tea polyphenols and reported changes in circulating hormones, including DHT. The study was designed around a mouse prostate-cancer model, not hair loss.
Read the mouse prostate-model study.
What do acne and hair-loss mechanisms have in common?
Androgen signaling and 5-alpha-reductase are relevant to several tissues, which is why the same mechanism is discussed in acne, prostate and hair research. A result in prostate cells cannot be assumed to occur in human scalp follicles, and it does not establish a clinical treatment.
Is black tea a substitute for finasteride?
No. The cited evidence does not support calling black tea or theaflavin extract equivalent to finasteride, side-effect free or proven to avoid sexual adverse effects. Tea beverages and concentrated extracts also have different compositions and potential interactions.
Related black-tea research
Related product
For the black-tea compound discussed in this article, see Theaflavin.