Weight Loss Nutritional Supplements

The FDA is said to have just lately instituted a crack down on weight loss supplements as a result of very bad adverse reactions and even death associated with some dietary supplements like ephedra. The ban on ephedra products resulted to the roll-out of so-called ephedra free weight loss supplements, these too are said to yield their fair share of situations and they too could possibly be most likely going to a similar fate as ephedra.

These ephedra free medicines are said to cause a rise in heart rate and a several other negative effects on healthy individuals based on a health professional connoisseur who participated in the research program.

The study done through the University of California at Berkeley was the primary one to look into the health effects of reformulated weight loss supplements. Some of the things investigated for included hypertension and heartbeat rate of volunteers who were given reformulated weight loss supplements made from extracts of bitter orange.

Ever since the ban slapped on ephedra by FDA, an ever-increasing number of body weight loss product manufactures have converted to extracts of bitter orange. The USB investigation required 20 healthy volunteers, who received single doses of a weight loss supplement or a placebo.

The diet supplements used in the study were Xenadrine EFX and Advantra Z, each of which includes bitter orange extracts. The administered drug was shown to effect a boost in heart pulse rate as high as 16 beats in one minute. The Thermogenic Xenadrine EFX in particular was shown to rev up heartbeat by 13 per cent, something that makes it almost the same in performance to ephedra.

Bitter orange extracts include synephrine, a element present in over 90% of citrus fruits but found in larger concentrations in fruits such as Sour orange, Zhi shi and bitter orange and which happens to be widely used as a medication in the control of respiratory tract congestion and high blood pressure. Xenadrine EFX includes a stimulant in the constituent, usually caffeine. The quantity of caffeine is Xenadrine is believed to be the same as 3 coffee cups. This is the component responsible for the increase in blood pressure and affected individuals using this product are cautioned against over dosage.