Compared to ephedrine (or nor-ephedrine) based products, this is absolute crap. This is what a normal dose contains: Vitamin C 100 mg Vitamin B6 10 mg Pantothenic Acid 12 mg Magnesium 10 mg Proprietary Thermodyneâ„¢ Complex 1415 mg Tyroplexâ„¢ (proprietary blend of l-tyrosine and acetyl-l-tyrosine), Green Tea Extract (standardized for EGCG and caffeine), Seroproâ„¢ (proprietary cocoa extract standardized for PEA (phenylethylamine), tyramine and theobromine), Yerba Mate (standardized for caffeine), di-Methionine, Ginger Root (standardized for gingerols), Isothermâ„¢ (proprietary blend of quercetin and fisetin), Bitter Orange (standardized for synephrine), DMAE (2-dimethylaminoethanol), Grape Seed Extract. I seriously doubt this proprietary mess of substances will even touch ephedrine. Ephedrine is so popular because it is effective. This product looks like a marketing ploy. BTW ephedrine is not the strongest fat burner. There is also clenbuterol, T3, and DNP (DNP on which you can easily lose a pound a day--it raises your metabolism by 50% compared to ephedrine which raises your metabolism by a paltry 3%). All of these of course you can't buy at GNC, are not legal to use except in rare circumstances, and in the case of DNP and T3, there are serious risks associated with them if used incorrectly.