Studies have shown that The ECA Stack works by stimulating brown adipose tissue (BAT) but just what is BAT? And why is the the best fat in the body?
Brown fat is the only metabolically active fat tissue in the human body. It accounts for less than 1 per cent of total body weight. Its function is to burn kcals and release the energy as heat. When this tissue is stimulated by ECA (in a process called thermogenesis) it wastes kcals, actually burns fat from your body without diet or exercise changes, although those are desirable changes in the overfat person.
Now jump to one theory of obesity which posits that overfat people are overfat because their bodies use kcals more efficiently. That is, thin folks just naturally burn more kcals than fat folks even when they are just sitting around! Using ECA to stimulate the BAT in this instance puts the overfat person on track with the thin person, allowing the overfat person to lose weight.
BAT levels are not consistent in all people. That is, researchers have found that fat folks have less BAT than thin folks. Researchers have also posited that overfat people may have defective brown fat tissue. The use of the ECA Stack may actually help burn kcals and aid in weight loss by allowing the BAT of fat folks to work in the same way that the BAT of thin folks works.
BAT info obtained from "Nutrition and Diet Therapy", Lutz & Przytulski, F.A. Davis & Co., Philadelphia, 1994, p 438.