Washington Center for Clinical Research, Washington, DC 20016, USA.
Public Health Nutr. 2010 Oct;13(10):1629-35. doi: 10.1017/S136898000999303X. Epub 2010 Jan 15.
To examine whether a worksite nutrition programme using a low-fat vegan diet could significantly improve nutritional intake.
At two corporate sites of the Government Employees Insurance Company, employees who were either overweight (BMI > or = 25 kg/m2) and/or had type 2 diabetes participated in a 22-week worksite-based dietary intervention study.
At the intervention site, participants were asked to follow a low-fat vegan diet and participate in weekly group meetings that included instruction and group support (intervention group). At the control site, participants received no instruction (control group). At weeks 0 and 22, participants completed 3 d dietary records to assess energy and nutrient intake.
A total of 109 participants (sixty-five intervention and forty-four control).
In the intervention group, reported intake of total fat, trans fat, saturated fat and cholesterol decreased significantly (P < or = 0.001), as did energy and protein (P = 0.01), and vitamin B12 (P = 0.002), compared with the control group. Intake (exclusive of any use of nutritional supplements) of carbohydrate, fibre, vitamin C, magnesium and potassium increased significantly (P < or = 0.0001), as did that for beta-carotene (P = 0.0004), total vitamin A activity (P = 0.004), vitamin K (P = 0.01) and sodium (P = 0.04) in the intervention group, compared with the control group.
The present study suggests that a worksite vegan nutrition programme increases intakes of protective nutrients, such as fibre, folate and vitamin C, and decreases intakes of total fat, saturated fat and cholesterol.
研究以低脂纯素饮食为基础的工作场所营养方案是否能显著改善营养摄入。
在政府雇员保险公司的两个公司场所，体重超重（BMI≥25kg/m2）和/或患有 2 型糖尿病的员工参与了一项为期 22 周的基于工作场所的饮食干预研究。
在干预地点，要求参与者遵循低脂纯素饮食，并参加每周一次的小组会议，包括指导和小组支持（干预组）。在对照地点，参与者未接受任何指导（对照组）。在第 0 周和第 22 周，参与者完成了 3 天的饮食记录，以评估能量和营养素摄入。
共有 109 名参与者（65 名干预组和 44 名对照组）。
与对照组相比，干预组总脂肪、反式脂肪、饱和脂肪和胆固醇的报告摄入量显著下降（P<0.001），能量和蛋白质（P=0.01）以及维生素 B12（P=0.002）也显著下降。与对照组相比，干预组的碳水化合物、纤维、维生素 C、镁和钾的摄入量显著增加（P<0.0001），β-胡萝卜素（P=0.0004）、总维生素 A 活性（P=0.004）、维生素 K（P=0.01）和钠（P=0.04）的摄入量也显著增加。
本研究表明，工作场所的纯素营养方案增加了保护性营养素的摄入，如纤维、叶酸和维生素 C，同时减少了总脂肪、饱和脂肪和胆固醇的摄入。
