| Re: Green Tea
I agree with TheHappyMan, supplements are designed to supplement, not replace diet and exercise. However, the is very creditable research on a number of different "supplements that do indeed aid in fat loss.
Supplementation with green tea extract reduced the activity of a chemical in blood vessels (VEGF). This is thought to be a promising step to defeating cancer as well as improving insulin sensitivity in lean muscles that promotes better fat loss.
An active ingredient in fish oil, eicosapentaenoic acid (EPA) was shown to promote fat cell apoptosis (destruction and death). This effect would help with fat loss and weight control.
The popular pro-hormone, DHEA was shown to enhance insulin function in rhesus monkeys, and this effect resulted in a reduction in body fat.
An extract from the jojoba plant (Simmondsin) was shown to reduce appetite in rodents, but this supplement also suppressed the ability to produce blood cells. This isn’t a good side effect if you’re an athlete. So it’s back to the drawing board for that one. Also yohimbine, caffeine, and blood vitamin C levels all seem to affect fat metabolism.
Source: Obesity Research, 2005.
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