A low-carbohydrate, high-protein diet may increase the risk for cardiovascular disease, according to a large study in Swedish women.
The study, published in the journal BMJ, was based on a random sample of 43,396 women ages 30 to 49, each of whom completed a dietary questionnaire. The researchers used the data to create a 20-point scale, with higher scores indicating a lower ratio of carbohydrates to protein.
During an average of 15 years of follow-up, there were 1,270 cardiac events, mostly ischemic heart disease and strokes. After controlling for numerous risk factors, the researchers found that women had a 5 percent increase in cardiovascular events for each increase of 2 points on the scale. (That translates into a daily 20-gram decrease in carbohydrates and a 5-gram increase in protein.)
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