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If your doctor suspects you have leukemia, they may do a B12 test before ordering a more complex test, such as a bone marrow biopsy
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Research suggests a direct link between B12 levels and mental health
Clinical signs of B12 deficiency include nausea, vomiting, loss of appetite, poor absorption of food (malabsorption syndrome), constipation, gas, weight loss, fatigue, lethargy, abdominal pain, and diarrhea
Age-related epigenetic drift and phenotypic plasticity loss: implications in prevention of age-related human diseases
If the symptoms of vitamin B12 deficiency are not evident earlier because of the folate intake, the effects may become irreversible
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