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Some patients also notice an upset stomach, nausea, constipation, diarrhea, or a heavy, full feeling, especially at the beginning or with higher doses
Rand K, Qu W, Ho T, Clark S, Molloy P (2002) A Companion to Methods in Enzymology Methods 27 : 114120
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Key Takeaways Serum B12 alone misses up to 50% of functionally deficient patients always add MMA for confirmation The optimal longevity range for serum B12 is 500900 pg/mL, far above the standard lab cutoff of 200 pg/mL B12 deficiency progresses through four stages, from depleted stores to irreversible neurological damage Methylcobalamin is the preferred supplementation form for most people
[PMID: 24925768] PubMed record related to this compound for laboratory literature review
