Atkins dieters tended to consume more saturated fats than people on the South Beach and Ornish diets,and as a result showed decreased blood vessel dilation -- which stresses blood flow from the heart.
Atkins diet hard on the heart
April 1, 2009
A study funded by the U.S. Institute of Health looked at cholesterol levels and other cardiac risk factors for dieters who had remained on the diet after reaching their goal weight.