i.e "should I become vegetarian?"

Would a randomised controlled trial find that a vegetarian diet leads to better health outcomes than a vegan diet? (conditional on a reasonable RCT being done)

Resolves YES if a study is released showing that vegetarianism is healthier than veganism.

Resolves NO if a study is released showing no difference (with a suitable effect size) or that vegan is better.

Does not resolve if no reasonable RCT is done.

As for effect sizes, I don't know enough science to quantify what i'm interested in. Something in the ballpark of 2 or more QALY difference. (although I suspect that we would only be able to find much larger effect sizes with an RCT). Mental health counts.

The RCT can be published in 2024 or it could already exist. If you think you have such a study, cite it and explain the results and why it's reasonable.

As for reasonableness, the trial would have to span a period of 1+ month and not have glaring issues with controls and a decent sample size. Participants should ideally be given omega-3, b12, iron supplements, etc.

Vegetarian includes eggs, dairy, and bivalves (e.g., clams, oysters, mussels, scallops)
Vegan includes none of the above.