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[61] The classic test for PA, the Schilling test, is no longer widely used, as more efficient methods are available
Research-context answer There is no approved missed-dose guidance
Vitamin B12 is essential for red blood cell production, nerve function, energy metabolism and the synthesis of DNA
Still, the following will usually appear tired, pale skin, weakness, shortness of breath, a fast heartbeat, and a feeling that you are out of breath
Many adults dont get enough B12 through diet alone, especially if they follow a vegetarian or vegan lifestyle, have certain digestive conditions, or simply dont absorb nutrients as efficiently with age
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