fda warning letter bpc-157 peptide not approved FDA's Overreach on Compounded Peptides The Unregulated World of Peptides:
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For a deeper primer on what peptides are and how they act, see what do peptides do, are peptides safe and are peptides steroids

Compounded and FDA-approved medications are not interchangeable

Who said that B12 and Cobalt serve different purposes

Laboratories studying cartilage matrix biology, chondrocyte proliferation and differentiation, and growth factor signalling in musculoskeletal research models have incorporated this fragment as an experimental variable representing an expanding research frontier beyond its primary metabolic applications

[DOI] [PMC free article] [PubMed] [Google Scholar] 43.Ramsey KM, Mills KF, Satoh A, Imai S
Depending on your circumstances, multiple injections may be necessary to achieve optimal B12 levels