The Zone diet is a diet popularized in books by biochemist Barry Sears. It advocates consuming calories from carbohydrates, protein and fat in a ratio of 40% / 30% / 30%. Some nutritional experts, including some of Sears’ former colleagues, have criticized his conclusions from the scientific evidence, contending that he has distorted or exaggerated the meaning of much of the basic research. They point out that no direct studies to verify his conclusions have been performed.





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