is it healthier to eat no meat?

[FlatAssembler]

All vegetarians are at higher risk for iron deficiency, Flat. That's the main thing to weigh or manage in light of whatever benefit you hope to extract from a vegetarian diet. Semi vegetarians less so because of that semi bit. I do love the word semi vegetarian, though. A beef burrito with cheese is my favorite semi vegetarian dish.

Even if that's true, avoiding heme iron still seems like a good deal to me. People rarely die of anemia, but people commonly die of colon cancer. So having a slightly increased risk of anemia in order to have a slightly lower risk of colon cancer seems like a good thing.

By semi-vegetarians, I meant people who avoid red meat.