bpc-157 research effects safety and the Difference Between an Evidence Gap and a Cover-Up: What the entire human evidence base actually looks like, and the questions to ask next. — WellFounded The Hidden Risks of BPC‑157:
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Before we jump into the subject of money, let's first understand what B12 shots are all about

Improvement of vitiligo after oral treatment with vitamin B12 and folic acid and the importance of sun exposure

10.1128/CVI.00071-16 48

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GHK-Cu is noted to cause more injection site reactions than many other peptides

In this respect, further studies with larger sample sizes, different doses, and types of vitamin B12 will reveal additional evidence