My understanding of this and experience so far has been that the ECA stack works pretty well, but its been years since I have used it (since they made ephedrine a behind the counter item), but in all honesty, nothing works like getting your diet right and nothing will work if you don’t. The ratio is probably upwards of 95% diet and possibly 5% supplements (probably less) in terms of effectiveness. Thing is, nobody makes money telling you to eat right, its easier to sell you something.