Ephedrine is a powerful substance.. It is a must-have, but it is important to locate the genuine stuff. It's almost impossible to say the least. Since Kaizen has been made inaccessible in the UK and I've visited a variety of sites. 30mg of it is enough for me in a single dose, and it's much better when used in the form of an ECA stack. I've had a few luck in recent times! I'm not sure if I could post any links on this site however the product these guys sell has been the closest to Kaizen I've ever witnessed. It's a powerful product. I've shed a lot of weight , and am now closer to 10% body fat. They're definitely worth it. Anyway yeah here's the link ECA stack UK (Sorry for my English i'm from Iceland)