Is there anything it can't do? I have noted, however, that larger doses cause nausea for me. That is, 3 or more grams on an empty stomach. I just vomited after taking 7.5 grams before my meal, but I have not yet established the causal link. It is the largest amount I've ever taken at one time. I suspect that it may have contributed significantly, but that it was also one out of half a dozen factors.