maybe so. i really can't think of any specific reason why a vegan would get more sick. unless there are a lot of antibiotics passed through the food that most people eat. however, my understanding of pharmacology and physiology makes that doubtful. it was probably just a coincidence. however, i think there is kind of a right and wrong way to do vegan. and of course you have to see if your body tolerates it well. i didn't try vegan, but I did try vegetarian at one point in my life. lost too much weight, no matter how much I ate and felt light-headed frequently so i suppose it is not for everyone.