Omega Gro  : An extract from the fruit of the Serenoa rapens tree, saw palmetto is one of the most commonly used vitamins for hair growth and DHT blocker pills because it has the ability to support hair growth. Omega Gro  Reviews  It does so by blocking an enzyme known as 5-alpha-reductase. This enzyme is known to convert testosterone to DHT, which in turn causes hair follicle miniaturization. http://www.garciniamarket.com/omega-gro-dht/