What evidence do you have for this? Along with the environmental devastation and the obscene cruelty of factory farming, the overwhelmingly negative health effects of meat and dairy consumption are the third pillar in the triumvirate of reasons to go vegan, or at the very least to limit and reduce consumption of animal products. For example, the World Health Organization classifies processed meats (bacon, salami etc) as group 1 carcinogens, meaning they are known to cause cancer. Processed meats may be the worst, but the health impacts of other meats and dairy products aren't a whole lot better. Combine those facts with the plethora of meat substitutes and plant-based dining options now available, and plant-based diets are increasingly becoming an easy and obvious choice.