Vitamin B12 is an essential vitamin used by the body to metabolize carbohydrates and to create energy
Possible complications heart failure severe neurological deficits gastric cancer type 1 diabetes rheumatoid arthritis myasthenia gravis (a chronic condition causing muscle weakness) Hashimotos disease (an autoimmune condition affecting the thyroid) A pregnant or nursing person with a B12 deficiency When a person receives treatment for a B12 deficiency, they generally recover well and cease to have symptoms, although they may need to continue to use B12 nutritional supplements
Digestive issues: Loss of appetite, weight loss, constipation, or diarrhea
"Proton Pump Inhibitors, H2-Receptor Antagonists, Metformin, and Vitamin B-12 Deficiency: Clinical Implications"
High-dose oral vitamin B12 supplements (1000-2000 micrograms per day) have also been shown to raise levels, because high doses can usually compensate for the bodys poor absorption
