bpc 157 tp500 The Peptide Craze Unlocking the Power of Peptides:
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However, a few limited studies have raised concerns about the possible side effects of taking vitamin B12: A 2019 study found that taking more than 25 micrograms (mcg) per day or higher was associated with an increased risk of bone fractures in postmenopausal women

Science 377 , eabn7950 (2022)

However, Huberman also noted an important caveat: "There isn't any clinical data for BPC-157

In two trials employing 1000 g/day oral vitamin B 12 , there was no clinically relevant difference in vitamin B 12 levels when compared with IM vitamin B 12
