Groganics DHT Blocker 2-A-Day Healthy Hair Vitamins are packed with vitamins, minerals, amino acids, biotin and folic acid which feeds the hair follicle from the inside. Groganics 2-A-Day Healthy Hair Vitamins obstructs DHT and promotes hair growth from the inside-out. Our 2-A-Day Healthy Hair Vitamin includes the herb saw palmetto which is used to prevent/treat hair loss.