does b12 injection cause insomnia vitamin supplementation insomnia? Vitamin B12 Side Effects: Risks
Description
5 Side Effects from Vitamin B12 Shots Although vitamin B12 injections are generally safe, some adverse reactions may occur

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In rare cases, allergic reactions like difficulty breathing, swelling of the face or throat, or a fast heartbeat may occur

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Gastrointestinal symptoms of a B12 deficiency disease may include a loss of appetite, weight loss, and diarrhoea
