Vegan since 15 years and healthy :) It's true that plants produce antinutrients to protect themselves from predators. However, if you know how to prepare food, these substances can be largely broken down. Furthermore, animals also consume these antinutrients, and then humans eat the meat or its derivatives, thus ingesting antinutrients as well. In addition, meat contains a lot of stress hormones because the animals are afraid when they realize they are about to be killed. These stress hormones are then absorbed by human.