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Until the recent breakthrough on preparation of 15 N-labeled cobalamins via biosynthesis [8] and further development of the first multiple stable isotope dilution assay (SIDA) that simultaneously determines the four natural vitamers [7], the quantification of B12 in foods has been relying on methods mainly applying microbiological assays [9, 10], (U)HPLC-UV [11,12,13,14,15,16,17], and occasionally LC-ICP-MS [18]
Understanding who benefits most from this option helps set realistic expectations
Why do we need Vitamin B12 / MIC
Systemic reactions may include nausea, mood changes, or hormonal shifts that impact menses or sperm parameters
For 1 to 2 nuts per day, this still delivers well above the 55 microgram adult daily requirement
Only the concentration and the corresponding syringe draw change
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