fda warning bpc-157 not approved safety concerns Approval Status: Is It for Human Use? Peptides like BPC-157 and TB-500
Description
If you switch the form and the symptoms go away, that tells you the issue wasn't the B12 itself or the level it was the specific form your body had trouble with
As far as side effects are concerned, there's not much clarity

The amino groups on its molecular chain can tightly bind to negatively charged cell membranes or mucous membranes, enhancing the mucosal permeability of drugs

It is widely used in laboratory settings to dilute or dissolve research peptides before administration in non-human experimental models
Knee pain

Including, but not limited to: Diuretics such as: Acetazolamide
