Ephedrine is an extremely potent substance.. It's a powerful substance that I strongly recommend, but it's important to only take the genuine stuff. Which is nearly impossible to be honest. Since Kaizen was removed from the UK as of the beginning of this year, I've visited numerous sites. I've found that 30mg is sufficient for me, and it's more effective used in conjunction with an ECA stack. I did have some luck this past week! I'm not sure if it's allowed to share links on this site, but the product they sell is as close to Kaizen as i've ever been. It's an extremely powerful product, for sure. I've shed a lot of weight, and am now at 10% body fat. In all honesty, I rate these. Anyway yeah here's the link ECA stack UK (Sorry for my English i'm from Iceland)