Synephrine goes by many different names from Bitter Orange, Citrus Aurantium, Synephrine HCL, and many others. Many of the different types a person can pick out the word synephrine like in Methyl-Synephrine HCl.
Synephrine is the active ingredient in Bitter Orange which is a tree found in Asia. Many parts of the tree are used in the formulation of medicines and supplements including the peel, leaf, fruit, and the flower. This is another reason you see Synephrine listed by different names likes Bitter Orange Fruit. The oil from the peel and flower is used to make oils used to treat fungal skin infections like ringworm.
Benefits of Synephrine
The most common uses (1) for synephrine or bitter orange are to support an upset stomach, promote weight loss, and increase exercise performance. The oil of bitter orange is one of the most researched benefits which is considered effective working on fungal skin infections.
As with any nutritional supplement ingredient it is best to consult your doctor before starting any supplement regime.
Synephrine for Weight Loss
Synephrine has become popular for weight loss supplements after the ban on ephedra alkaloids, by the FDA, in 2004. With nutritional manufacturers looking for an ephedra and ephedrine fat burner alternative. Synephrine is legal to buy online though is banned from competition in the NCAA.
Many studies have looked at synephrine and weight loss. Most of the research (2) has come to two consistent points. Synephrine appears to have weight loss benefits and that more research is needed. Synephrine has been combined with caffeine and low calorie diets in many of the studies. Many of the studies show weight loss gains though there are some that do not which aids in the idea that more than one factor is important in weight loss success.
A 1999 fat loss study in the journal of Medicine & Science in Sports & Exercise concluded that a formulation of citrus aurantium, caffeine, and St. John's Wort was safe and effective when combined with a low calorie diet and exercise program in reducing body weight and fat loss (3).
Is synephrine a stimulant?
Synephrine is not a stimulant though is often formulated with stimulants like caffeine.
Is synephrine an appetite suppressant?
Synephrine is not a appetite suppressant though like stimulants many of the supplements with synephrine have appetite suppressant ingredients like garcinia cambogia in them.
Synephrine's effect on the body
One of the main benefits often listed for synephrine is the ability as a metabolic booster without increases in blood pressure or heart rate. Click to read the study (4) that did show taking synephrine didn't increase blood pressure or heart rate in any of the participants. Some studies have shown that blood pressure and heart rate were increased though many of them had stimulants in the study like caffeine as well.
Ephedra has a large selection of supplements that contain synephrine that are also stacked with other weight loss ingredients like caffeine, yohimbe, ephedra, and more.