The costs of publication of this article were defrayed, in part, by the payment of page charges. This article must, therefore, be hereby marked “advertisement” in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.
A Two-Year Randomized Weight Loss Trial Comparing a Vegan Diet to a More Moderate Low-Fat Diet
Article first published online: 6 SEP 2012
2007 North American Association for the Study of Obesity (NAASO)
Volume 15, Issue 9, pages 2276–2281, September 2007
How to Cite
Turner-McGrievy, G. M., Barnard, N. D. and Scialli, A. R. (2007), A Two-Year Randomized Weight Loss Trial Comparing a Vegan Diet to a More Moderate Low-Fat Diet. Obesity, 15: 2276–2281. doi: 10.1038/oby.2007.270
- Issue published online: 6 SEP 2012
- Article first published online: 6 SEP 2012
- Received for review September 27, 2006, Accepted in final from January 30, 2007
- weight-reducing diet;
- women's health;
- weight maintenance;
- weight loss
Objective: The objective was to assess the effect of a low-fat, vegan diet compared with the National Cholesterol Education Program (NCEP) diet on weight loss maintenance at 1 and 2 years.
Research Methods and Procedures: Sixty-four overweight, postmenopausal women were randomly assigned to a vegan or NCEP diet for 14 weeks, and 62 women began the study. The study was done in two replications. Participants in the first replication (N = 28) received no follow-up support after the 14 weeks, and those in the second replication (N = 34) were offered group support meetings for 1 year. Weight and diet adherence were measured at 1 and 2 years for all participants. Weight loss is reported as median (interquartile range) and is the difference from baseline weight at years 1 and 2.
Results: Individuals in the vegan group lost more weight than those in the NCEP group at 1 year [−4.9 (−0.5, −8.0) kg vs. −1.8 (0.8, −4.3); p < 0.05] and at 2 years [−3.1 (0.0, −6.0) kg vs. −0.8 (3.1, −4.2) kg; p < 0.05]. Those participants offered group support lost more weight at 1 year (p < 0.01) and 2 years (p < 0.05) than those without support. Attendance at meetings was associated with improved weight loss at 1 year (p < 0.001) and 2 years (p < 0.01).
Discussion: A vegan diet was associated with significantly greater weight loss than the NCEP diet at 1 and 2 years. Both group support and meeting attendance were associated with significant weight loss at follow-up.