Eating healthy foods is very importante. We must do it everyday, not just occasionally, to get enough vitamins and proteins. Of course, everyone would prefer to eat whatever they want but there are some priorities. We need to eat healthy foods so that our body doesn´t get damaged or ill. Making a jump to vegetarians or vegans might be a trial. Suddenly changing food makes you feel uneasy.
Yes, it can be na improvement but the effort and mental stress might be difficult to overcome, but if you have already grown up used to it, then it will be easy.