May 2023 in “Health science reports” Coloring shampoos for gray hair may cause gene mutation, reproductive issues, and skin damage, needing stricter regulation and expert consultation.
September 2014 in “Hair transplant forum international” Caffeine, niacinamide, and panthenol may improve hair growth, fullness, and healing when applied to the scalp.
January 2020 in “Journal of translational science” 
99 citations,
June 2005 in “Journal of Cosmetic Dermatology” Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.
3 citations,
October 2007 in “Expert Review of Dermatology” Hair ages due to various factors and treatments like minoxidil and finasteride can help, but more research and better public awareness are needed.
93 citations,
April 2012 in “International Journal of Cosmetic Science” Improving skin barrier and using antifungal treatments can help manage dandruff.
81 citations,
June 2012 in “European journal of human genetics” Inherited ichthyoses cause widespread skin scaling and thickening due to gene mutations.
42 citations,
November 2005 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” New hair products are being developed to keep hair and scalp healthy for everyone.
12 citations,
January 2007 in “Acta dermato-venereologica” Europe needs a clear system to watch over cosmetics for safety and to make sure product claims are true.
24 citations,
September 2020 in “Pharmaceutics” Lidocaine-loaded microparticles effectively relieve pain and fight bacteria in wounds.