September 2014 in “Hair transplant forum international” Caffeine, niacinamide, and panthenol may improve hair growth, fullness, and healing when applied to the scalp.
205 citations,
March 2012 in “Science Translational Medicine” PGD2 stops hair growth and is higher in bald men with AGA.
131 citations,
July 2009 in “Experimental Dermatology” The document concludes that specific cells are essential for hair growth and more research is needed to understand how to maintain their hair-inducing properties.
77 citations,
July 2020 in “Cell” Muscles and nerves that cause goosebumps also help control hair growth.
April 2023 in “Clinical theriogenology” The dog's skin condition improved after removing a tumor that was causing hormone imbalances.