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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

Neutralization of interleukin-17 aggravates dextran sulfate sodium-induced colitis in mice

An overloaded, fatty liver processes nutrients less efficiently, contributes to systemic inflammation, and can worsen the energy dips that many people report during the initial weeks of treatment

But high blood levels of B12 do not mean symptoms are well treated