being a vegan person is so common these days and also the number of people who are adopting this food habit escalates every day. there is a dispute on this subject that because folks can obtain healthy without the consumption of meat, it is better for everybody, to be vegan. this idea is valid to a certain extent. investigation on some bodybuilders and other sportsmen showed that it is not suitable for all people to avoid consuming meat. in this ,article we will scrutinize various angles of this argument, and at the end, I will add my opinion on that.