They do not have any significant side effects
Vitamin B12 deficiency is associated with cognitive problems (problems with thinking, judgment, and learning) and memory issues
For this compound, the most important COA items usually include compound name, salt form, CAS number, molecular formula, molecular weight, lot number, assay or purity result, analytical method, identity confirmation method, water content if tested, residual solvents if tested, storage recommendation, and retest or expiration information where provided
Risks include injection site reactions, rare allergic responses, and hypokalaemia during treatment of severe anaemia
If in doubt, one should consult the pharmacy or manufacturer for guidance or replace the vial with a fresh supply
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