Risks and Side Effects While generally safe, vitamin B12 injections can have side effects or risks, such as: Mild pain, swelling, or redness at the injection site Dizziness, headache, or nausea Allergic reactions (rare) Hypokalemia (low potassium levels) in individuals with severe deficiency undergoing treatment People with allergies to cobalt or who have Lebers disease should avoid B12 injections unless specifically advised by a doctor
Pakistan Journal of Biochemistry & Molecular Biology
Babies aged 7-12 Months 0.5 mcg
The injection site should always be cleaned with an alcohol swab and allowed to dry before injecting
2 In comparison with other B vitamins, B 12 is not synthesized by animals, fungi, or plants
Bypasses common absorption issues for maximum effect