There is a new generation of carb blockers on the market. Phaseolus vulgaris, which is a standardized extract from the white kidney bean, works by blocking those enzymes responsible for the digestion of carbohydrates.
Fat blockers commonly contain chitosan, which is similar to dietary fibre but derived from the exoskeletons of shellfish. Like fibre, chitosan passes through the digestive tract without being digested, but also reportedly absorbs between six and 10 times its own weight in fat along the way, which is then flushed out of the body.
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