I used to be vegetarian but am now vegan. I feel much better now I don't eat dairy. I used to get dreadfully bloated if I ate yogurt or cheese. I don't eat wheat very much either. Perhaps once every two weeks and that helps too.
I don't have a big appetite at the best of times so haven't ever been a big eater, but I do feel much more comfortable being vegan.
I'm vegan for ethical reasons (was vegetarian from age 10 for 21years prior to goi g vegan). I've pretty much eaten a vegan diet since January and lost over 4st but I've made the complete change now, as in no ice cream on a day out. No cheese on holiday etc. I definitely feel so much better for it