Bosley’s Bosley Pro Healthy Hair Follicle Energizer is a potent leave-in treatment designed to nourish hair and boost thickness and fullness. Enriched with Biotin, Caffeine, and Apple Stem Cell Extract, it strengthens hair follicles to support healthy hair growth.Vegan, sulfate-free, cruelty-free, and paraben-free, it offers a gentle yet effective solution for those looking to combat thinning hair. The botanical extracts and stimulating ingredients protect and repair hair, leaving it voluminous and lively.