93 citations
,
January 2007 in “Skin Pharmacology and Physiology” Caffeine in shampoo quickly enters the body through hair follicles.
8 citations
,
July 2019 in “Pure and Applied Chemistry” Some natural compounds from Iris plants can block enzymes related to certain disorders, with a few affecting both targeted enzymes.
18 citations
,
August 2014 in “Lipids” Human hair has more unsaturated fats inside than on the surface, and certain lipids may help bind the outer and inner layers together.
16 citations
,
August 2004 in “Tetrahedron” Scientists made all eight versions of a compound called cyoctol, but found it's not an anti-androgen and it fully breaks down in the skin.
October 2025 in “Experimental & Molecular Medicine” Hair analysis is valuable for health and forensics but faces challenges like growth variability and contamination.