Advantra Z is a patented ingredient that is found in many weight loss supplements. Nutratech, the manufacturer of Advantra Z, claims that its ingredients aid in burning fat, without the serious side effects of other weight loss aids.
Advantra Z contains bitter orange extract, protein, carbohydrate, omega-3 and 6, sodium, and vitamin A and C.
The bitter orange extract in Advantra Z contains alkaloids that reportedly rev up metabolism and break down fat. They are related to the ephedrine alkaloids.
The key ingredient is bitter orange extract (citrus aurantium); it has been promoted as a safe weight loss alternative to ephedra.
Bitter oranges were brought to the Americas in the 16th century by the Spanish and Portuguese, while the Chinese have used it as a tonic and treatment for dyspepsia for thousands of years.
Contrary to the manufacturer's assertions, Advantra Z does have side effects. According to a study by the School of Pharmacy at University of California, San Francisco, synephrine (bitter orange extract) elevates blood pressure and heart rate.