How Does ECA Stack Work?
Ephedrine
Ephedrine has been shown to increase the effectiveness of thermogenesis (fat burning) in the body. It has powerful effects on the cellular mechanisms that control fat release from fat cells. Some of these effects include contributing to the release and blocking the re-uptake of the neurotransmitter norepinephrine. This gives norepinephrine the ability to continuously stimulate receptors in your body, causing fat cell "flood gates" to open and facilitate fat loss. The Chinese herb ma huang (Ephedra sinica) is the chief natural source of the ephedrine family of compounds, although there are other minor sources, such as Sida cordifolia.
Caffeine
The second key thermogenic ingredient caffeine is a methylxanthine that stimulates hormone-induced fat burning. The caffeine in the ECA Stack comes from kola nut and green tea extract. Caffeine works by increasing free fatty-acid concentrations and adrenaline levels. This results in greater lipolysis (oxidation of fats for energy), which can drain your fat stores over time. This change in a muscle's utilization of energy substrates can have a profound effect on fat loss. Caffeine also heightens mental alertness, which can positively affect your motivation to exercise and create the caloric deficit needed to lose body fat.
Aspirin
Aspirin is the popular name for acetysalicylic acid. It raises the body's internal "thermostat," so that the increased production of heat, which is typical of ECA products, does not set off alarms in the body. This allows the ephedrine and caffeine to work in your body for a longer period of time, giving you the maximum fat-burning potential.
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