ALA is a mixture of R and S ALA. The R being the natural and the S being synthetic. The S part gets in the way of the R and inhibits it's ability to partition your carbs. So you want to remove it by buying pure R-ALA. The only product proven to be pure R-ALA being sold is Glucorell R. You can get it at the AF Store www.anabolicfitness.net/shop