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This is a common cause of B12 deficiency in the UK and is usually diagnosed by your general practitioner
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After 1 month of treatment in pernicious anemia patients, the once weekly dosing of 500 mcg B12 intranasal gel resulted in a statistically significant increase in B12 levels when compared to a once monthly 100 mcg IM dose
The effects of vitamin B12 supplementation in pregnancy and postpartum on growth and neurodevelopment in early childhood: Study Protocol for a Randomized Placebo Controlled Trial
What Are the Cons of Vitamin B12 Injections
This includes individuals with medical conditions such as pernicious anemia, atrophic gastritis, celiac disease, or Crohns disease, all of which can interfere with B12 absorption
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