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A review discussing BPC 157 as a potential treatment for COVID-19 echoes similar issues with available data surrounding BPC 157, but does note that BPC 157 has been proven to be efficacious and safe in clinical trials evaluating its use for inflammatory bowel disease (mild to moderate ulcerative colitis)

Glutathione also doesn't absorb into skin very easily so results tend to be modest and fade if you stop using it

AOD-9604 is not FDA-approved, so a clinician will evaluate the reaction without label-based guidance

PMID: 16556893

The amount of scientific evidence that supports the safety and efficacy of non-glutathione skin-whitening treatments is higher than those available for glutathione treatments