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The TLDR isn't a shocker:

In this randomized clinical trial of the cardiometabolic effects of omnivorous vs vegan diets in identical twins, the healthy vegan diet led to improved cardiometabolic outcomes compared with a healthy omnivorous diet.

Would like to see a couple of the middle ways peppered in (pescetarian, vegetarian).

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Would also like to see a longer trial than 2 months.

Agree, but I do think there are real clinical benefits to short trials like this. For example, it's good to have evidence that one could quickly improve their cardiometabolic health immediately after a cardiovascular event just by switching to vegan.

My recollection is that pescatarian significantly outperforms all other eating patterns in terms of mortality, when treated as a distinct group. It is infrequently broken out in large studies, unfortunately. This also often isn't highlighted in the headlines for these studies, probably because they get more engagement along the popular "meat or plant" angle.

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