I have updated the article Disease Rates of Vegetarians and Vegans with the results from a report on vegetarian mortality rates that was released this week from the Adventist Health Study-2. I have reproduced the highlights below.
There was also an article on this study published in the Wall Street Journal, Vegetarians Live Longer Than Meat-Eaters, Study Finds.
In 2013, death rates for the first 5.8 years of Adventist Health Study-2 (AHS2) were released (1). When combining vegans, lacto-ovo-vegetarians, pesco-vegetarians, and semi-vegetarians into one group, vegetarians had a 12% lower risk of mortality. Vegans had a 15% lower risk of death, but it was not quite statistically significant.
The difference in mortality rates can mostly be explained by a lower incidence of cardiovascular disease among vegetarian men. Vegetarian women had about the same rates as non-vegetarian women. This is similar to the findings from the first Adventist Health Study. There was also a benefit for all vegetarians for death from renal and endocrine (mostly diabetes) disease.
The researchers said that having only 5.8 years of follow-up would bias the results towards not finding differences.
In comparing their findings to British vegetarians, they said:
“The lack of similar findings in British vegetarians remains interesting, and this difference deserves careful study. In both cohorts, the non-vegetarians are a relatively healthy reference group. In both studies, the nutrient profiles of vegetarians differ in important ways from those of non-vegetarians, with vegetarians (especially vegans) consuming less saturated fat and more fiber. It appears that British vegetarians and US Adventist vegetarians eat somewhat differently. For instance, the vegetarians in our study consume more fiber and vitamin C than those of the EPIC-Oxford cohort: mean dietary fiber in EPIC-Oxford vegans was 27.7 g/d in men and 26.4 g/d in women compared with 45.6 g/d in men and 47.3 g/d in women in AHS-2 vegans; mean vitamin C in EPIC-Oxford vegans was 125 mg/d in men and 143 mg/d in women compared with 224 mg/d in men and 250 mg/d in women in AHS-2 vegans. Individuals electing vegetarian diets for ethical or environmental reasons may eat differently from those who choose vegetarian diets primarily for reasons of perceived superiority for health promotion. We believe that perceived healthfulness of vegetarian diets may be a major motivator of Adventist vegetarians.”
Make sure you eat your fiber!
1. Orlich MJ, Singh P, Sabaté J, et al. Vegetarian Dietary Patterns and Mortality in Adventist Health Study 2. JAMA Intern Med. 2013;():1-8. doi:10.1001/jamainternmed.2013.6473. | link