What is "exorphin"

n. Any compound, formed outside of the brain, that interacts with opiate receptors; especially any of a range of peptides, formed during the metabolism of gluten, that are thought to disrupt brain function in autistic children.

Exorphins are exogenous opioid peptides, distinguished from endorphins (or endogenous opioid peptides).

Exorphins include opioid food peptides and microbial opioid peptides and any other opioid peptide foreign to a host that have metabolic efficacy for that host.