What it is: A highly concentrated advanced hair serum that's scientifically formulated to promote thicker, fuller and healthier hair.Who it's for: Ideal for those with thin or thinning hair.What it does: Thanks to over 42% active ingredients all designed to fight hair loss, this serum is scientifically formulated to promote thicker, fuller, healthier hair. At the core of RD2, this high-functioning serum will deeply penetrate the scalp to encourage circulation, promote healthy hair follicles, block DHT and ultimately minimize hair loss. Packed with a game-changing combination of clinically proven actives, natural extracts and a multi-peptide complex, RD2 is a lightweight, non-greasy, non-sticky hair serum that will ensure efficient scalp penetration and full efficacy. Paraben-free; phthalate-free; sulfate-free; silicone-free Made in the USA