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Choose based on your primary goal, start conservatively, and adjust based on results
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doi: 10.1038/s41418-017-0053-8 49 ShenXChenYTangYLuPLiuMMaoTet al
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
When that happens, your defenses go down
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