The scientific name Citrus Aurantium refers to a citrus tree Bitter Orange that is native to southern Asia but has been spread to many parts of the world. Due to the overly sour and bitter taste of the bitter orange fruit; it is not commonly eaten instead the active ingredient Synephrine is extracted from the peel and is used in fat burners.
The main function of Synephrine is increasing metabolic rate and is an effective fat burning ingredient. Studies have shown that when Synephrine has been taken before a workout the body will burn more fat than carbohydrates.
Synephrine is a legal substance and is often confused with the now-banned substance Ephedrine because of how similar the effects are. Ephedrine strongly stimulates the alpha-1 and alpha-2 adrenoreceptors leading to increased heart rate and blood pressure, however, Synephrine is less potent and only weakly stimulates these receptors.
Synephrine is a stimulant and is often combined with caffeine to elevate the fat-burning effects and may also enhance cognitive function.