Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou, People's Republic of China.
Nutrition. 2013 Feb;29(2):426-30. doi: 10.1016/j.nut.2012.07.016. Epub 2012 Dec 5.
To compare the effect of vegetarian diets and omnivorous diets on triacylglycerols (TGs).
We identified cross-sectional and cohort studies related to TGs (an index of blood lipids) listed on PubMed and ISI Web of Knowledge, bibliographies, and related references and studies suggested by search engines to further increase the range of data collected (all-year time span until May 2011).
Twelve studies with 1300 subjects were included for meta-analysis. Vegetarian diets were effective in lowering plasma TG concentrations (standardized mean difference -1.28 mmol/L, 95% confidence interval -2.14 to -0.42); in eight developed countries, plasma TG levels were insignificantly lower in vegetarians than in omnivores (standardized mean difference -0.31 mmol/L, 95% confidence interval -1.13 to 0.50), but in four developing countries, the phenomenon was obvious (standardized mean difference -4.06 mmol/L, 95% confidence interval -7.43 to -0.70).
Compared with omnivorous diets, vegetarian diets provide health benefits, especially in developing countries. This favorable effect occurs even if vegetarian diets last for at least 6 mo.
比较素食和杂食饮食对三酰甘油（TGs）的影响。
我们在 PubMed 和 ISI Web of Knowledge 上列出的与 TGs（血脂指标）相关的横断面和队列研究、参考文献和搜索引擎建议的相关研究中进行了检索，以进一步扩大数据收集范围（所有年份跨度到 2011 年 5 月）。
纳入了 12 项包含 1300 名受试者的研究进行荟萃分析。素食饮食可有效降低血浆 TG 浓度（标准化均数差值-1.28mmol/L，95%置信区间-2.14 至-0.42）；在 8 个发达国家，素食者与杂食者的血浆 TG 水平无显著差异（标准化均数差值-0.31mmol/L，95%置信区间-1.13 至 0.50），但在 4 个发展中国家，这种现象则较为明显（标准化均数差值-4.06mmol/L，95%置信区间-7.43 至-0.70）。
与杂食饮食相比，素食饮食可带来健康益处，在发展中国家尤为如此。即使素食饮食持续至少 6 个月，这种有利影响仍然存在。
