Weight Loss Dietary supplements
The FDA is said to have just lately instituted a crack down on weight loss supplements as a result of really serious uncomfortable side effects and even death connected with some weight loss dietary supplements such as ephedra. The ban on ephedra products resulted in the introduction of so-called ephedra free weight loss diet supplements, these too have been shown to yield their own fair share of issues and they too may very well be destined to a similar fate as ephedra.
These ephedra free medications are said to cause a boost in heart rate and a couple other side effects on healthy people as outlined by a health expert who was in the study.
The study done with the University of California at Berkeley was the best one to go into the health effects of reformulated weight loss supplements. Some of the things tested for included hypertension and pulse rate of volunteers who were given reformulated weight loss dietary supplements manufactured from extracts of bitter orange.
Since the ban slapped on ephedra by FDA, a large number of weight loss product manufactures have turned to extracts of bitter lemon. The USB study involved 20 healthy volunteers, who received single doses of a weight loss supplement or a placebo.
The weight loss supplements tested in the research were Xenadrine EFX and Advantra Z, each of which contains bitter orange extracts. The administered drug was shown to effect a rise in cardio pulse rate as high as 16 beats in one minute. The Thermogenic Xenadrine EFX especially was shown to rev up heart rate by 13 per cent, an element that makes it almost equivalent in performance to ephedra.
Bitter orange extracts contain synephrine, a component present in over 90% of citrus fruits but found in higher concentrations in fruits such as Sour orange, Zhi shi and bitter orange and that is popularly used as a medication in the management of respiratory tract congestion and blood pressure. Xenadrine EFX features a stimulant in the ingredient, usually caffeine.
The quantity of caffeine is Xenadrine is estimated to be roughly the same as 3 coffee cups. This is the constituent the reason for the boost in blood pressure and patients using this product are cautioned against over dosage.
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