The diet is based on the premise that grapefruit has an enzyme that burns fat, says Andrea N. Giancoli, a spokesperson for the American Dietetic Association, but that enzyme has never been pinpointed.

美国饮食协会的发言人Andrea n . Giancoli说，这种饮食是以葡萄柚含有能燃烧脂肪的酶为前提的，但这种酶从未被准确地找出。

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"We all need to be moving towards a more plant-based diet, " Giancoli said.

CNN: Woman goes raw, loses more than half herself

"The raw diet, specifically, the philosophy behind it is scientifically incorrect, " Giancoli said.

CNN: Woman goes raw, loses more than half herself

Giancoli recommends people meet with a dietitian to develop a balanced eating plan before they embark on a raw food diet.

CNN: Woman goes raw, loses more than half herself