Pura D'or anti-hair loss shampoo has a natural preservative system derived from 100% plant based extracts. This is combined with premium ingredients that is free of SLS (Sulfates), Parabens or any other harmful chemicals. It has all the advance DHT blockers of our proven formula plus more. All ingredients are clinically proven to help with thinning hair and scalp problems. DHT is a hormone that is responsible for hair loss. Our formula blocks these hormones and starts by nourishing follicles with essential nutrients to resuscitate lifeless hair and begins the regeneration process. Biotin strengthens hair strands, niacin increases circulation and our exclusive DHT Blocker Blend promotes healthy hair growth. Safe for daily use, all hair types, color-safe and for both men and women. Allow at least 3 months of continued daily use for noticeable results.