Here's my two cents as well. I researched lots of met-boosters and decided to give them a try (ephedra free of course). I have been taking a supplement called T2 by Sci-fit. It was suggested I take 2 in the morning on an empty stomach, that didn't work for me, I felt nauseous, so I take 2 with breakfast and 2 = 30 minutes before I work out at lunch time - these don't contain that Ma Haung either, I have no palpitations whatsoever and I am not sleep interupted either. While working out, I can tell my metobolism is working faster. I honestly think these are helping with my weight loss. I asked questions about these on the exercise forum but nobody responded.

Vikki