Synephrine is the main active ingredient in Citrus aurantium extract, which can effectively prevent excess energy (accumulation of heat), disperse wind and regulate qi, warm the stomach, promote appetite and accelerate metabolism. Lime could theoretically accelerate fat metabolism without the adverse cardiovascular effects of ephedra patients. It is also a mildly fragrant expectorant, a nerve sedative and a laxative for constipation,
Foreign studies have found that the main role of synephrine is to oxidize fat and lose weight.