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[36] Vitamin B 12 deficiency is most commonly caused by malabsorption, but can also result from low intake, immune gastritis, low presence of binding proteins, or use of certain medications

32 , 10521062 e1058 (2020)

This educational protocol presents a gradual weekly titration from 0.25 mg up to a maintenance dose of 2.4 mg over 16+ weeks, using a practical dilution for precise insulin-syringe measurements

The mixture was then incubated for 10 min at 4 o C (obtained by nesting the mixture in wet ice)

Working with a knowledgeable provider is key, as they can guide you through the options that make the most sense for your body and health history