Although you don't see so much of that these days, one of the remaining fears about the potential dangers of low-carb diets is that kidney damage will result. Has there ever been one bit of research that indicates this? Well, no...but, the research had not been done! The notion has been that since people with some kinds of kidney damage do better on a low-protein diet, eating more protein will cause kidney damage. Never mind that a) low-carb diets aren't necessarily (or even usually) particularly high in protein (more like slightly higher, especially at first) and b) studies of diabetics followed over time showed no relationship between the amount of protein people were eating and their risk of the kind of kidney damage related to diabetes (in fact, physicians have noted reversals of this type of damage on low-carb diets).
Now there is a report of a study published in the Clinical Journal of the American Society of Nephrology which followed 300 healthy obese people for two years, half on a low-carb high-protein diet and half on a low-fat diet. Kidney functioning in both groups was fine, and stayed fine the whole time.
One after another, the fears about low-carb eating are being calmed.
Note: I've been trying to get my hands on the original study to no avail, so I don't know exactly how much protein, fat, or carbohydrate people were eating. Usually, I wouldn't write about a study without reading it, but this has been in quite a few TV and news outlets. For that reason, consider this blog a "blurb" rather than a full report from me.
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