So is the following plant-based foods
Gluten exorphin (from gluten found in cereals wheat, rye, barley) Gliadorphin/gluteomorphin (from gluten found in cereals wheat, rye, barley) Soymorphin-5 (from soybean) Rubiscolin (from spinach)
https://en.wikipedia.org/wiki/Opioid_peptide#Opioid_food_pep...