1000 mcg vitamin b12 injection Cyanocobalamin (B12) mcg/mL, Multiple Dose Vial 1 mL, 25/Tray lethargy and skin or coat issues Methylcobalamin 10,000mcg injectable, 10mL (lyophilized)

Taking more than one product can amount to more vitamin B12 than your body needs

Larsen TM, Toubro S, van Baak MA, Gottesdiener KM, Larson P, Saris WH, et al

[DOI] [PMC free article] [PubMed] [Google Scholar] 56.Morita R., Sanzen N., Sasaki H., Hayashi T., Umeda M., Yoshimura M., Yamamoto T., Shibata T., Abe T., Kiyonari H., et al

With just three ingredients GHK-Cu, AHK-Cu, and distilled water this minimalist formula is paraben-free, dye-free, fragrance-free , and rigorously third-party tested with 99% purity confirmed by in-house HPLC

While bacteriostatic water helps, degradation can still occur over time

Age-Related Considerations Age is a big factor in how often you might need B12 shots