how many b12 injections are needed Injection Dosage and Frequency: 7 Guidelines for Adults B12 INJECTIONS - The Nurse

Reported effects are mild and transient: Localized irritation or redness at injection site, Mild fatigue or transient headache during initial days, Rare gastrointestinal upset (nausea, stomach discomfort)

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A healthy immune system is particularly important during the winter months when people are more likely to spend time indoors in close quarters with others, increasing the risk of illness

Yes, you can take B12 supplements or a multivitamin that includes B12