research Increased cAMP Levels in Human Hair Follicles Due to Local Treatment with Trichoriboside January 1994 in “PubMed” Trichoriboside treatment helps maintain scalp hair by increasing cAMP levels in hair follicles of men with hair loss.
research Several Selective Protein Kinase C Inhibitors Including Procyanidins Promote Hair Growth 32 citations, January 2000 in “Skin pharmacology and physiology” Certain substances that block a specific protein help promote hair growth.