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Protocols, doses, and reactions reported below come from published clinical trials and self-reported community sources
Beyond the temporary detox symptoms linked to B12, there are a few potential side effects to keep on your radar: Discomfort, discoloration, or bruising at the point of injection
Foods high in B12 include fish, meat, poultry, eggs, dairy produce, and foods that are fortified with B12 (like some breakfast cereals.) If you follow a restrictive diet or have a condition that impacts absorption, you could be at risk for a B12 deficiency
Energy levels often improve as your body gets better at using fat for fuel
Display borderline insulin resistance or early metabolic syndrome
Poor hygiene or reused needles can cause infection, and an injection placed badly can rarely irritate a nerve
