Dermatologists from the University of Jena have confirmed that caffeine stimulates weakened hair roots. In-vitro tests on genetically predisposed hair roots have proven that caffeine provides protection against the harmful impacts of the male hormone testosterone. For the first time ever, Alpecin (After Shampoo Liquid) contains a large dose of this active ingredient. Alpecin should be used in a timely manner and massaged into the scalp regularly after hair washing.
