Add walnuts to your diet to improve cholesterol levels finds in a new study. The women in the high-fat, low-carb group, who consumed monounsaturated fats but not walnuts, did not benefit from the same effect, with lead author Cheryl Rock commenting that “What we found is that a diet high in healthy oils did lower lipids, but it….. Add walnuts to your diet to improve cholesterol levels finds new study – Daily News & Analysis