Question: how much weight do you lose when you become a vegetarian?
Answer: (The range was from eight weeks to two years.) The good news is that individuals on both vegetarian and vegan diets lost weight when compared to subjects in the meat-eating control groups. On average, the non-meat eaters lost 4.5 pounds. The vegans lost an average of 5.5 pounds and the ovo-lacto vegans lost 3.3 pounds.