A friend has recently tried "starch blockers" and found that they had no good effect on her weight because she gained a couple of pounds. Plus she developed huge carb cravings.

I have to agree about the Metabolife brand and trusting them. They were selling pills with ephedra in them until the government in several countries made that ingredient illegal. Too many cases of racing heart, heart attack and other problems. And all the while, Metabolife was claiming the pills were perfectly safe. So I look at any of their claims with more than a little suspicion. JMHO