Also known as: Alpecin, caffeine shampoo
Topical stimulant that may counteract DHT suppression of hair growth in vitro.
Topical caffeine penetrates hair follicles and stimulates hair shaft elongation by inhibiting phosphodiesterase, increasing cAMP levels. In vitro studies show it counteracts testosterone-induced suppression of hair matrix keratinocyte proliferation.
Unlock Premium Content
Get full access to in-depth analyses, cited studies, premium articles, and AI chat.
$12/mo
View pricing