https://www.saintlukeskc.org/about/news/research-shows-vegan-diet-leads-nutritional-deficiencies-health-problems-plant-forward#

“Animal-based foods have been an important part of the human diet for at least three million years. Eliminating all animal foods would be like deciding you’re going to feed a tiger tofu and expect that it’s going to be healthy. If you want an organism to thrive, you should feed it the diet for which it’s been genetically adapted via evolution down through the ages.”