Overweight and obese adult women were enrolled in a one-year behavioral weight loss program and randomly assigned to one of three diets consisting of either: low-fat and high-carbohydrate; low-carbohydrate and high-fat; or a walnut-rich, high-fat and low-carbohydrate diet.
The findings showed that all three dietary plans promoted similar weight loss. Insulin-sensitive women lost the most weight with a low-fat diet but that strategy did not result in the most benefit for lipid levels.
The walnut-rich diet had the most impact on cholesterol levels by decreasing low-density lipoprotein (LDL), or bad cholesterol, and increasing beneficial high-density lipoprotein (HDL). The high-fat, low-carb group, which consumed monounsaturated fats, did not experience the same beneficial effects as the walnut-rich diet, which featured polyunsaturated fatty acids.
At six months, the average weight loss was almost 8 percent among all groups.
Cholesterol Levels Improve with Weight Loss and Healthy Fat-Rich Diet
Source: UC San Diago Health