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Those over 70 may need 20 mcg (800 IU)

Typically ships within 1-2 working days

In the U.S., injectable B12 (cyanocobalamin and hydroxocobalamin) is only available with a prescription, as regulated by the FDA

Symptoms such as muscle tremors and abnormal movements have been observed, but these effects typically resolve with appropriate management and follow-up

Systemic allergic reactions to the benzyl alcohol in bacteriostatic water are extremely rare, especially given the small amounts used, but as with any injection, if you were to develop symptoms like hives, difficulty breathing, or low blood pressure after an injection, seek medical care