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And Im sure not all these people are doing lab rat studies at home

A substantial quantity of experimental evidence demonstrates that NF-B participates in the epithelial-mesenchymal transition (EMT) process vital for the local and distant progression of cancer by up-expressing the marker N-cadherin of mesenchymal and down-expressing the marker E-cadherin of epithelium (86)

BPC-157 is not an approved medicine

Britton A, Roper LE, Kotton CN, et al.Guideline 2

Its always best to consult with a healthcare professional to determine if B12 shots are appropriate for your particular needs and to discuss the potential benefits and any associated risks or considerations.