control arm is standard care-现有生活，包括standard American diet

可以参考一下这两个大的试验：

--Mediterranean Diet Reduces Atherosclerosis Progression in Coronary Heart Disease: An Analysis of the CORDIOPREV Randomized Controlled Trial

 

--Reduction in the Incidence of Type 2 Diabetes with Lifestyle Intervention or Metformin

也看一下新的:american national cancer care plan (https://www.hhs.gov/about/news/2023/04/03/hhs-releases-national-cancer-plan.html)

虽然不容易，但是这样的试验也不少了。记住素食不是WFPD，薯条也是素食，素食不一定健康。我设计的试验和Ornish的试验里研究者只需要提供3个月的套餐。