I got into a buying craze a few months back and I bought Glucorell, Syntrax R as well as * R-ALA to try out. I mix and match all the time. Truthfully, I haven't noticed a a big difference in either brand. Glucorell is the only one with biotin in it, which appears to be a plus. For the price, it's the best bang for the buck [Glucorell]. I don't think you'll be dissapointed in either choice. Syntrax R comes in 90 caps, mikes comes in 100 and Glucorell comes in 120 caps