Common side effects Injection-site reactions: mild redness, tenderness, swelling, occasional bruising - usually resolve within hours Skin flushing / warmth - brief, related to vasodilation Transient fatigue in the first 12 weeks of intensive protocols Mild headache - usually dose-related Higher-dose theoretical concerns Copper accumulation - each 2 mg injection adds roughly 0.03 mg of elemental copper, trivial next to the 0.92.2 mg from a normal diet
It can mean more binding protein in circulation, vitamin released from injured cells, reduced clearance by the liver or kidneys, recent intake, or analytical interference, where the measured value does not accurately reflect the true B12 status
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When in doubt, always consult a doctor or pharmacist, especially if you are taking medication.
Side effect comparison table The bottom line on safety: cagrilintide alone has a milder side effect profile