nDNA 8 for men's hair has a breakthrough formula that blocks dihydrotestosterone (DHT), hormone responsible for hair fall in men. Hair loss in men Hair loss and thinning hair have been sensitive issues for men throughout time. Recently, medical science has finally identified the main cause of hair loss. Now, it is a known medical fact that hair loss stems from both genetic and hormonal causes. Androgenetic Alopecia or “male pattern hair loss” is implicated in 95% of hair loss cases. The key is a hormonal byproduct called DHT (dihydrotestostrone). The more DHT that gets put into your body, the more your hair follicles become thinner and finer until the hair is permanently lost.