A high-protein diet is a diet in which 20% or more of the total daily calories comes from protein. Most high protein diets are high in saturated fat and severely restrict intake of carbohydrates.
Example foods in a high-protein diet include lean beef, chicken or poultry, pork, salmon and tuna, eggs, and soy. High-protein diets have been criticized as a type of fad diet and for promoting misconceptions about carbohydrates, insulin resistance and ketosis.
A 2017 review indicated that a high-protein diet may contribute to life-long risk of kidney damage, including chronic kidney disease. High-protein diets may increase the risk of coronary artery disease and cancer. A 2020 review found that a high-protein diet does not significantly improve blood pressure and glycemic control in people with diabetes.
The American Heart Association’s Nutrition Committee have issued a strong recommendation against high-protein diets such as Protein Power and the Atkins diet. The committee noted potential health risks of high-protein diets and how there are no long-term scientific studies to support their efficacy and safety.
The following high-protein diets have been criticized as fad diets:
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