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They give you one ratio and assume every vial is the same
People taking high-dose B12 supplements (1,000 to 5,000 mcg daily), receiving B12 injections (cyanocobalamin or methylcobalamin), or consuming heavily fortified foods can easily push their serum levels above 900 pg/mL
The release threshold is 99% per peptide rather than a combined number, so the COA carries four chromatograms, one for each component, alongside the integration data and method conditions
Because your body stores B12, it can take some years before you see symptoms that you're low on it
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