“This, to me, is like going to Nepal or going to Israel. It’s like another adventure,” said Hamdorf, a retired CPA.

The thrill, he said, lay in the purpose. For three two-week stints, Hamdorf had agreed to become a study subject in a project seeking to answer questions that have troubled nearly every person who brings fork to mouth: What will happen in my body after I eat this food? Will it make me fat, raise my cholesterol, mess up my gut microbiome — or perhaps extend my life?

https://www.bostonglobe.com/2024/04/13/metro/diet-personalized-nutrition-tufts-study/