Half as much is suggested for a 100 pound person. The manufacturer's reputation is more important for herbs than it is for other nutritional supplements. In the list below, I've compared Metabolift TM and Metabolite 356 TM . Metabolift TM is made by TwinLab, one of the most popular and reputable supplement manufacturers.
Ephedrine releases noradrenaline in the brain which raises the metabolic rate and body temperature.
It can exacerbate panic attacks, insomnia, and anxiety. The best results observed in a study are 5.3 pounds lost in 2 months. Metabolift TM contains 10 mg ephedrine per pill and Metabolife 356 TM contains 12 mg. Guarana supplies caffeine which increases the effects of the ephedrine. There are several studies that investigate the combined effect.