Ephedrine is derived from the Ephedra plant. It induces fat loss which increases the amount of fat available for fuel, aka increasing your anabolic window for exercise (prevents muscle waste). It also increases heat expenditure, increasing the metabolic rate by 5%. It works effectively alone as a weight loss medication, however, studies have shown its effectiveness is improved when combined with aspirin and caffeine.
Caffeine stimulates the CNS and your cardiovascular system. It works as a booster for the ephedrine as a weight loss medication. Studies showed participants lost two or more pounds monthly when combined with the ephedrine. Aspirin prevents the norepinephrine levels from decreasing and helps maintain the stimulation effects of the ephedrine.