Studies from the university clinic in Jena prove that caffeine penetrates the hair roots, thereby protecting the hair from negative testosterone impacts and from premature hair loss.
Based on the formula of the caffeine shampoo (patent pending), this is accomplished after being left on the scalp for no more than 2 minutes.
This is proven by a new study that was conducted at the Berlin university clinic (Charité). Thanks to a novel measuring method, the penetration of caffeine in the tested shampoo formula can be proven for the first time.
Graphic 1 shows the entire penetration, i.e. across the scalp and the hair follicles.
Graphic 2 represents the difference in dermal and overall penetration. It shows the path of penetration via the hair sheath directly to the hair follicle.
As a result, we distinguish between short-term penetration through the hair follicle and long-term penetration through the scalp.
This proves that daily hair washing with caffeine shampoo adds active caffeine to the hair follicle. When being left on for 2 minutes, caffeine penetrates the hair follicle, thereby strengthening weakened hair roots and preventing hereditary hair loss.
Alpecin Caffeine penetrates even though the shampoo is rinsed out.
Over a short period of time (120 sec.), the active ingredient travels along the hair shaft directly to the hair root.
If the shampoo is left on for longer, the caffeine will also penetrate through the scalp.