L:ast week, a Harvard study found that low-carb diets did not increase women's risk for coronary heart disease.

This week, Dr. Dean Ornish, creator of The Life Choice Diet, challenged those findings in a column in Newsweek.

First, Ornish makes a distinction between good carbs and bad carbs, then he attacks the study's methods.

"In the Harvard study, women were asked to complete a food frequency questionnaire that asked them to write down how much and how often, on average, during the previous year they had consumed different foods. [...] I don’t know about you, but I have a hard enough time remembering exactly what I ate yesterday," Ornish writes.

The diet guru also says parts of the study contradict its conclusions. Check out the full article and see what you make of it.

-- Amanda Barrett, amNY.com