Synephrine is an active compound that may be found in the fruit called Citrus aurantium or Zhi Shi in Chinese. Its chemical composition is similar to ephedrine and pseudo-ephedrine that may be found in most over the counter cold or allergy medications, weight loss and energy supplements. Unlike ephedrine, Synephrine is considered to be semi-selective sympathomimetic that targets tissues such as fats instead of the heart. It also helps the metabolism without the negative effects of ephedrine to the nervous system. It also increases the energy level, helps the body burn fat and promotes weight loss. It also aids the body to increase the quickness of caloric expenditure.