what is the function of glutathione peroxidase family: Discoveries and mechanism The Selenoprotein Glutathione Peroxidase 4:

doi:10.1038/bjc.2012.310

While egg white proteins are also an option and can be less reactive, unfortunately, those with Hashimotos who start using them often find themselves with new-onset egg reactions, because egg whites are difficult to digest for people with intestinal permeability

Those who need to avoid retinoids during pregnancy may find copper peptide formulations a useful alternative, though formal pregnancy-safety studies for GHK-Cu are limited and consulting a clinician remains advisable

While BPC-157 can be injected or orally consumed, the latter route may be associated with more targeted effects on the GI tract