The ECYA stack combines ephedrine, caffeine, aspirin and yohimbine.
Ephedrine is a well-known as one of the strongest fat burners used by bodybuilders and people who diet to kick start a weight loss program.
Ephedrine and caffeine work together synergistically. When stacked, the combined effects of Ephedrine, Caffeine, aspirin and Yohimbine are far greater than the sum of their effects when used individually.
This is a great fat burning combo.