The ECA (ephedrine, caffeine and aspirin) stack was arguably the greatest fat loss stack of all time. It delivered quick fat loss, insane energy and destroyed appetite. Unfortunately, ephedrine is no longer legal to purchase so the ECA stack is a thing of the past. The Enhanced Labs formulations team was given the formidable task of finding a replacement for the ECA stack. It took years of research and hundreds of different product formulations until our formulations team finally hit a home run. The supplement matrix in ECA SHRED provides all the same benefits as the ECA stack, but without the adrenal crash. Our formulations team was able to make such an effective product because all the ingredients in ECA SHRED work synergistically with one and another. This allows the ingredients to work even more efficiently then taking them individually. It?s similar to a 1 + 1 = 3 analogy.