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Other common side effects of B12 injections include: Diarrhea Headache Swelling (and not only at the site of the injection) If you experience any uncommon side effects, such as chest pain or hives, contact your health care provider immediately

I would advise on NOT getting the 2nd shot

TB-500 can be injected anywhere subcutaneously Combined protocols typically run 6 to 8 weeks User reports consistently suggest the combination produces better outcomes than either peptide alone

*For Research Use Only* Last Updated: 2026-07-16 Our peptides are 3rd party tested and the results can be viewed before placing an order