Well there is the main reason why I've been trying to edge towards vegetarianism, it's a big source of cholesterol, and raises your risk of stomach/colon cancer. Not to mention some other possible health concerns with regards to the antibiotics, growth hormones, and just the general chemicals that the animal you're eating has picked up through it's food/water/environment.
Cholesterol is not the problem. It's more of a symptom/byproduct, like smoke near a fire. Heck, apparently these days, plain unsaturated fat is fine. Trans fats are often the problem, and trans fats are found plentiful in margarine, fries, cookies, donuts, a whole bunch of plant stuff.
There's a heart institute that my father went to when having heart problems. I noticed that a lot of the people with serious heart issues are
vegetarians. Mostly Indians who ate the oily indian breads several times a day.
Also good point about antibiotics and chemicals being possibly dangerous. But there are pesticides/herbicides/chemical fertilizers in crops as well. While some of the chemicals get passed through to livestock, livestock feed tend to be lower quality, less likely to eat the chemicalized crops.
I'm saying that health is a poor reason to stay away from eating meat. Other reasons like ethics, empathy, ok. But I've taken a more meat heavy diet lately after realizing that most of the sickest people I know are hardline vegetarians. There are vegetarian athletes, of course, so this isn't a hard stance, but few athletes actually become vegetarian for health reasons.