Anthimus, a 5th century Greek physician, wrote a tract entitled The Dietetics in which he advised Christians to be moderate in eating and drinking, and argued that foods selected should be easily and readily digestible.
He warned Christians against eating eight items: bacon-rind, cheese (especially aged varieties), eggs (hard boiled), fish (old fish), mushrooms, oysters, pickled meat, and pigeon.
Grivetti, L.E. (2000) Food prejudices and Taboos. Cambridge World History of Food. Cambridge University Press.