Does meat consumption cause the body or mind (or both) excessive stress?

(I’ve tried to find some material to reference but cannot at the moment)...but I’ve heard somewhere that consumption of meat causes the body unnecessary stress and that one can actually feel calmer on a vegetarian diet…physically and mentally.

Even though I love my meat I am considering trying to go vegetarian for a week to try this theory out. What are your experiences? Have you read or heard anything similar? Can you site me any articles that I can read?