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For individuals requiring supplementation due to confirmed deficiency or malabsorption, therapeutic doses vary considerably depending on the underlying cause: Dietary deficiency : 50150 micrograms daily orally, or cyanocobalamin tablets as prescribed Pernicious anaemia : Initially hydroxocobalamin 1 mg intramuscularly three times weekly for two weeks, then maintenance injections every two to three months [3] Neurological involvement : More intensive regimens may be required, with hydroxocobalamin injections on alternate days until symptom improvement [3] NICE guidance emphasises that supplementation should be evidence-based rather than speculative
The desalted sample was evaporated to dryness in a speedvac and then resuspended in 10 L Buffer A and analyzed by mass-spectrometry using the following LC-MS gradient: 5% buffer B in buffer A from 0-15 min, 515% buffer B from 1517.5 min, 1535% buffer B from 17.592.5 min, 3595% buffer B from 92.595 min, 95% buffer B from 95105 min, 955% buffer B from 105107 min, and 5% buffer B from 107125 min
Serum vitamin B12, C and folate concentrations in the New Mexico elder health survey: correlations with cognitive and affective functions
Higher concentrations (3-4%+) are for experienced users who have established tolerance
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