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How long does it take to feel the effects of a B12 injection
Vitamin B12 supplementation is needed in them, however, #vitaminB12 excess may have adverse effects on health and life
Mayo Clinic - Vitamin B12 deficiency anemia National Institutes of Health (NIH) - Vitamin B12 Fact Sheet for Health Professionals Harvard Health Publishing - Vitamin B12 deficiency: What to know NHS (National Health Service) - Vitamin B12 or folate deficiency anemia American Academy of Family Physicians - Diagnosis and Treatment of Vitamin B12 Deficiency
2007 Sep;1(3):201-7
