All right then! I'm going to start using coffee as my shampoo!I think we could write another book on hair so aside from good nutrition I will chip in with caffeine topically and the tri-peptide topical on Amazon.
As an aside caffeine shows rapid absorption in the hair follicle. Note I said follicle as opposed to cutaneous. So shampoos with caffeine for example will show absorption when left on hair for greater than 1 min studies say. This may show why shampoos with growth factors may be absorbed when left on for a few minutes to my previous cynicism on shampoos.