Pope Shenouda III
Man also remained vegetarian after his exile from Paradise. However, man was permitted, along with the beans and fruit, to eat from the herbs of the land, i.e. vegetables. Thus, when he sinned, God said to him: “And you shall eat the herb of the field. “ (Gen 3:18).
We have not heard that our Father, Adam, and our Mother, Eve, fell ill because of malnutrition. On the contrary, we hear that Adam, a vegetarian, lived 930 years. (Gen 5:5). So were also the lives of his sons and grandsons who were vegetarian. (Gen 5)