Going vegan might even help you live longer, especially if you also cut down on your daily calories.Better weight control may be one reason for all of these health benefits. Vegans have a lower body mass index (BMI) than people who eat animal-based products.Good nutrition is another perk. Fruits, vegetables, whole grains, and nuts are staples of the vegan diet. These foods are rich in fiber, antioxidants, and compounds that help protect against diseases like diabetes and cancer.