too much of anything is harmful. moderation and consistent learning about what you're eating.

it also depends on a person's body type some people digest meat easier than they would digest certain veggies.

I highly recommend people spend a couple hundred bucks and take a DNA based food allergy test just to get an idea of what made you should watch out for in your diet. you may not be allergic to something but it may cause inflammation in your gut that you do not notice that makes it so that certain nutrients cannot uptake.

again, moderation. people live into the hundreds eating all kinds of shit