Oral versus intramuscular administration of vitamin B12 for vitamin B12 deficiency in primary care: a pragmatic, randomised, non-inferiority clinical trial (OB12)
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These include: itching and swelling of the face, throat, or tongue breathing difficulties severe dizziness sudden vision changes slurred speech
These biomarkers arent specifically used to determine whether vitamin B12 might help you, but they help your doctor understand your overall health and can help identify the cause of symptoms like low energy, mood swings, or a lagging libido
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Additionally, health conditions like anemia can be addressed with vitamin B12 injections