had b12 injection but still tired I Feel All the Time. Do I Need a Shot?: Shawn Veiseh, M.D.: Family Medicine Feeling Tired? Vitamin B12 Shots

Some people may use them for a few months to restore healthy levels, while others choose ongoing supplementation as part of their wellness routine

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Vitamin B12 deficiency, including with pernicious anemia Schilling test (vitamin B12 absorption test) - not commonly used How Cyanocobalamin (Dodex) works Cyanocobalamin (Dodex) is a form of vitamin B12

For seniors with mild deficiencies, a standard oral supplement of 500 to 1,000 micrograms daily may be sufficient, as the body can only absorb a small percentage of B12 from supplements

Among those over the age of 60, about 2% have the condition