Act of 1994, the manufacturers of dietary supplements are no more required to bear the sanctions of the FDA and hence, the quality of these dietary supplements are shrouded with uncertainty.
Dietary supplements like Psyllium, Guar Gum and Glucomannan are considered as substances which can aid in lowering the calorie content and cause a rise in satiety thus aiding weight loss. Conjugated Linoleic Acid also is useful in fighting obesity by lowering deposition of fats through fat oxidation. The Hydroxycitric Acid which is extracted from the tamarind fruit reduces fat synthesis aiding weight loss. Green tea is a very effective resource in fighting obesity while the effectiveness of other products like Pyruvate, Licorice, L-Carnitine, Vitamin B5 have not yet been proved. Chitosan reduces the absorption of fats thus helping in fighting obesity. Ginseng and Chromium are considered to help weight loss by adjusting carbohydrate metabolism. Caffeine compounds and Ephedra are considered useful for weight loss. However, upon extensive study some of these products like Ephedra have been found to have harmful side effects and therefore are no more in use.
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