If you are vegan. . What were some of the long-term effects of this style of diet on your health? I mean, I became vegan, several months ago, and I feel very good – but I wonder about the long term. And today, I found that … Vegans are healthier than their long-term food counterparts meat. Vegans have far fewer cases of disease, heart problems, obesity, and will even get colds and the flu less frequently than meat eaters. I became vegan last summer, and so did my son. The winter before becoming vegan, my son had received no less than six colds. This last winter on a vegan diet, it does not even have a runny nose or cough. It is bigger, more muscular, and better sleep habits that the average child of his age. So do not worry about long term. . You will live a very long healthy life if you stay vegan.