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Phenylalanine burns fat

Earlier exercise studies found that taking a combination of amino acids speeds fat burning, but trials of single amino acids have been unclear.

In this study, six active, healthy men, aged 20 to 40, with healthy weight, took a placebo or 3,000 mg of the single amino acid phenylalanine 30 minutes before a cycle ergometer test. The test lasted one hour while the men maintained an exercise rate of 50 percent of their maximum oxygen consumption.

Compared to placebo, the men in the phenylalanine group used much less oxygen to complete the cycling test. Doctors also found higher levels of glucagon, the main hormone that increases glucose and fat in the bloodstream, signaling a greater fat-burning rate.

 

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