I use it but not faithfully lately (too lazy for 8 pills a day). When I do use HF37 faithfully I get results. My hair responded very well to the vitamins with increased thickness and shine. Not mention a major growth spurt in a month. My face did not break out as much and my nails grew a bit faster. When I showed my hair to my mother she said my ponytail almost didn't look real. It can up to 45 days before you see results.