Weight Loss Dietary Supplements

The FDA is said to have as of late instituted a crack down on weight loss supplements as a result of really serious adverse reactions and even death associated with some dietary supplements like ephedra. The ban on ephedra merchandise resulted to the development of so-called ephedra free weight loss supplements, these too have been shown to yield their fair share of troubles and they too could possibly be destined to a similar fate as ephedra.

These ephedra free medications have been shown to cause a boost in heart rate and a some other unwanted side effects on healthy folks as outlined by a health authority who was in the research program.

The examination done through the University of California at Berkeley was the primary one to research the health effects of reformulated weight loss supplements. One of the things screened for included high blood pressure and heartbeat rate of volunteers who were given reformulated weight loss supplements created from extracts of bitter orange.

Ever since the ban slapped on ephedra by FDA, an increasing figure of unwanted weight loss product manufactures have turned to extracts of bitter orange. The USB investigation engaged 20 healthy volunteers, who ingested single doses of a weight loss supplement or a placebo.

The diet supplements tried in the research were Xenadrine EFX and Advantra Z, each of which contains bitter orange extracts. The administered drug was shown to effect a boost in cardiovascular pulse rate all the way to 16 beats in one minute. The Thermogenic Xenadrine EFX for example was shown to rev up heart rate by 13 per cent, something which makes it almost identical in performance to ephedra.

Bitter orange extracts have synephrine, a ingredient contained in over 90% of citrus fruits but found in greater concentrations in fruits such as Sour orange, Zhi shi and bitter orange and which can be generally used as a remedy in the treatment of respiratory tract congestion and blood pressure. Xenadrine EFX includes a stimulant in the ingredient, usually caffeine. The quantity of caffeine is Xenadrine is estimated to be the same as 3 coffee cups. This is the ingredient responsible for the boost in blood pressure and individuals using this product are informed against over dosage.