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B12 Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism
More on this: Vegan and vegetarian sources of B12 To diagnose a vitamin B12 deficiency, doctors A doctor may order blood tests if they suspect a person has a vitamin B12 deficiency, including a complete blood count and tests to check levels of B12 and folate in the blood
Most users report initial effects like increased energy within the first one to two weeks
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