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Are The Kidneys Damaged By Low-Carb Diets?

Low-carbohydrate, high-protein diets – like the – have been popular among dieters for years. For just as long, experts have worried that such diets might be harmful to the kidneys. A study appearing in an upcoming issue of the Clinical Journal of the American Society of Nephrology (CJASN) looks into these safety concerns.

Allon Friedman, MD, () and his colleagues compared the effects of a low-carbohydrate, high-protein diet versus a standard low-fat diet on a variety of kidney-related measures in 307 obese individuals without kidney disease over a two year period.

The researchers found that a low-carbohydrate high-protein diet did not cause noticeably harmful effects to patients’ kidney function or their fluid and electrolyte balance compared with a low-fat diet. “These results are relevant to the millions of healthy obese adults who use dieting as a strategy,” said Dr. Friedman.

The authors noted that further follow-up is needed to determine even longer-term effects of the diet on the kidneys. Additional studies should also evaluate the effects of the diet in different types of individuals, such as those with chronic kidney disease, diabetes, or hypertension, and those at increased risk of developing .

Source

Study co-authors include Lorraine Ogden, PhD, Gary Foster, PhD, , MD, Richard Stein, PhD, Bernard Miller, MD, James Hill, PhD, Carrie Brill, Brooke Bailer, PhD, Diane Rosenbaum, and , MD.
An editorial will accompany the July 2012 print publication of this study.
Disclosures: The authors reported no financial disclosures.
The article, entitled “Comparative Effects of Low-Carbohydrate High-Protein Versus Low-Fat Diets on Kidney Function,” is online at http://cjasn.asnjournals.org/ , doi: 10.2215/CJN.11741111.
American Society of Nephrology