Every low carb book I have read suggests this supplement. Therefore I purchased it this month to see if it will help with my last 18 or so pounds I have to lose. As I said I just started it so it will take some time I'm sure. And I am not sure if it is any better than the store kind but I got mine at the Vitamin Shoppe store under brand name Tonalin...you can compare by looking it up on line maybe... good luck.