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Call 999 or attend an emergency department immediately if experiencing symptoms of anaphylaxis (difficulty breathing, severe rash, swelling of face/throat, feeling faint)

At Good Chemistry, we offer methylcobalamin and hydroxocobalamin two forms your body actually knows what to do with

Appetite and Nausea : Interestingly, a severe vitamin B12 deficiency can sometimes lead to a loss of appetite and even nausea

High-dose oral B12 (1,000 to 2,000 mcg daily) can actually correct deficiency even in some people with poor absorption, because a small percentage of B12 is absorbed passively (without intrinsic factor)

It is a phase 2 dose-finding study, not a definitive efficacy trial, and it was not powered or designed to detect uncommon harms

No organ damage or immune suppression has been reported at standard research doses