Procapil hair loss formula is an herbal DHT blocker developed in Europe. It contains a proprietary patented formulation of high potency Biotin, plus two additional natural ingredients, Apigenin made from grapefruit and other citrus, and Oleanolic acid, derived from olives. Procapil is a key ingredient in Bioscalp #4 Topical Scalp Serum for Hair Growth, which when combined with Redensyl, Bee Propolis and other ingredients, has been proven in clinical studies to promote hair growth and reduce hair loss.