Low-carb diets can be unhealthy, doctors warn

Reuters reports:

Low carbohydrate, high protein diets may help to shed weight quickly but researchers warned on Friday that they can be unhealthy.


The diets can cause constipation, diarrhea, headache, bad breath and ketosis, which causes raised levels of ketones, or acids, in the body.

"Low-carbohydrate diets for weight management are far from healthy," said Lyn Steffen and Jennifer Nettleton, of the University of Minnesota School of Public Health in Minneapolis, writing in the British Medical Journal.

They cited the unpleasant effects and a lack of trials to test the long-term effects of low-carbohydrate diets.

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