32 citations
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January 2000 in “Skin pharmacology and physiology” In this study, procyanidin B-2 and C-1 were found to promote hair growth by selectively inhibiting protein kinase C, supporting their potential use for hair-growing activity.
January 2011 in “Archivio Istituzionale della Ricerca (Universita Degli Studi Di Milano)” This study found that a combination of spermidin, rutine, and zeaxantine effectively reduced staurosporin-induced apoptosis in cultured hair follicle dermal papilla cells, potentially preventing the regression phase in the hair follicle cycle.