is it healthier to eat no meat?

[FlatAssembler]

I wonder if you think it's a good idea to drink blood... That's not how nutrition works at all. Just because cholesterol in your blood causes various health problems, that doesn't mean cholesterol you eat causes them. Similarly, just because heme iron in your blood doesn't cause colon cancer, that doesn't mean heme iron you eat doesn't cause it.

As a matter of fact, I had blood for breakfast yesterday.

You still don’t seem to grasp the difference between ‘cause’ and ‘increases risk’. Those studies you mentioned all come to more or less the same conclusion: a diet high in red meat increases the risk of colon cancer by about two tenths of one percent.

Boru

As far as I understand it, it is widely agreed that around 7% of cancers are caused by heme iron. That's why vegetarians, once you control for factors such as smoking, have around 7% less chance of getting cancer.