Long-term deficiency can damage the protective myelin around nerves, and if it is not addressed, some of that damage can become permanent, causing numbness, pain, and balance problems
Unregulated peptide use poses a significant risk due to inconsistent dosing, contaminants, and lack of clinical oversight. Harvey et al., Therapeutic Advances in Drug Safety Legal Status and Testing Concerns With 5-Amino-1MQ 5-Amino-1MQ exists in a regulatory gray area it's not illegal, but it's not FDA-approved for human use either
Peptides such as BPC-157 and TB-500 are: Not FDA approved for treatment of any disease For research purposes only Intended for use under the supervision of a licensed, peptide-trained provider Only available to current patients All protocols are provided strictly for educational and informational purposes and should not be used without medical guidance
You can still get B12 from dairy products, fortified cereals, and fortified non-dairy products if you're vegetarian