Citrus aurantium is regularly used by dietary supplement manufacturers because of its weight loss properties. It contains the chemical compounds tyramine, synephrine and octopamine, which promote the breakdown of fats, oils and lipids. The compounds in Citrus aurantium trigger the body to discharge the stress hormone, norepinephrine (or noradrenaline) throughout receptor sites, generating chemical reactions that boost the breakdown of fats and enhance the body's metabolic resting rate. Synephrine is a well known bronchial dilator, and is used extensively in with diet pills and weight loss formulas. It is first choice to take place of ephedrine in weight loss formula. Its primary use in the trade is to treat chest congestion and indigestion, stimulate gastrointestinal functions, and improve circulatory and liver functions. It functions to burn fat, increase physical performance, and build lean muscle mass.