It's extremely unlikely such symptoms are B6 related
Can You Use Retinol and Vitamin C Together
Regulation of the OxyR transcription factor by hydrogen peroxide and the cellular thiol-disulfide status
BPC-157 peptide therapy may be suitable for adults seeking relief from musculoskeletal pain or injuries, joint concerns, digestive issues, chronic inflammation, or central nervous system (CNS) disorders.8 11 It could also potentially be used for neuroprotection, nerve regeneration, repairing organ damage from substance overdoses, healing lesions, and more.7 However, its again important to reiterate that nearly all of the above potential benefits of BPC-157 have not been demonstrated in human studies or trials
GR stands for glutathione reductase and it's an enzyme that converts oxidized glutathione into a more active, bioavailable version of glutathione, known as 'reduced glutathione'