Citrulline is a crystalline amino acid found in all hair follicles and is critical for developing strong hair proteins. It's incredibly important in the early development process of hair growth by protecting developing hair cells. When there is a lower level of citrulline in the hair follicle, the resulting hair that grows tends to be much thinner, weaker, and contains much less pigment.
Naturally Occurring Amino Acid
Products with Citrulline: Complete Regrowth System + Follicle Plus 27