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Description
2016 Vitamin B12 among Vegetarians: Status, Assessment and Supplementation

Deficiency in vitamin B12 may cause anemia, fatigue, muscle weakness, intestinal problems, nerve damage, and mood disturbances

Additional risk factors include having your gut operated on, pancreatic insufficiency, small intestinal bacterial overgrowth (SIBO), parasite infections, and certain autoimmune disorders
Key takeaways $32.00 A serum B12 test measures the concentration of cobalamin (vitamin B12) circulating in the blood

Despite those scary possibilities, Hemphill-Bryant has reassuring info: Most people get all of the B12 they need from their diets

These questions havent been conclusively answered