I recently read a great article found in The Boston Globe titled: SHOULD WE EAT MEAT?
I found it to be an easy and quick read (just what I like) and I LOVED the matter-of-fact approach as the author answered this meat question. Here is a portion of the article, but you should read the whole thing...found here.
"Gary Fraser, who runs a long-range study of 35,000 vegetarians at Loma Linda University in California, said vegetarians fare better than moderate meat-eaters on measures of longevity, heart disease, diabetes, high blood pressure, obesity, and a few cancers. Giving up all animal products, including fish, dairy, and eggs is even better in measures of weight, diabetes, and high blood pressure, his research suggests.
I also LOVE the quote at the end of the article by Chef Mollie Katzen...
"I have nothing against meat. “I’m just profoundly pro-vegetable.”