Barnard, ND, Cohen, J, et al. A Low-Fat Vegan Diet and a Conventional Diabetes Diet in the Treatment of Type 2 Diabetes: A Randomized, Controlled, 74-Wk Clinical Trial. Am J Clin Nutr 89(5)1588S-96S. PMC2677007
This study compared two groups of people following a pre assigned diet. Free-living individuals with type 2 diabetes were randomly assigned to a low-fat vegan diet or a diet following 2003 American Diabetes Association guidelines. The vegan diet appeared to have a more pronounced effect on blood lipids and blood glucose than the conventional diet.
Wang, F, Zheng, J, et al. Effects of Vegetarian Diets on Blood Lipids: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. J Am Heart Assoc 4(10)e002408. PMC4845138
This was a systematic review and meta-analysis. It provides evidence that vegetarian diets effectively lower blood concentrations of total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and non-high-density lipoprotein cholesterol. It indicates that vegetarian diets could be a useful tool in managing vascular disease caused by high blood lipids.
Dinu, M, Abbate, R, et al. Vegetarian, Vegan Diets and Multiple Health Outcomes: A Systematic Review with Meta-Analysis of Observational Studies. Crit Rev Food Sci Nutr 57(17)3640-9.
This comprehensive meta-analysis showed a significant reduced risk for the development and mortality of ischemic heart disease and cancer amongst people following a vegetarian diet.