Oxygen Labs OXY-HYPER ECAOXYGENSLAB HYPER ECA (570MG CAP=60CAPSULES) The ECA stack combines ephedrine, caffeine and aspirin in a predetermined ratio. It causes your body to target specific fat cells to be burned for energy, all the while raising your overall metabolic rate and suppressing appetite. Each ingredient in an ECA stack works in conjunction with the next. Ephedrine works as a beta agonist and stimulates production of norepinephrine, as well as circulating it through