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Mild to moderate deficiencies of vitamin B12 are fairly common, with about 40% of people in Western populations reported to experience them [1]
Proton Pump Inhibitors (PPIs): How Omeprazole Affects B12 Levels Omeprazole, a common proton pump inhibitor, can lower vitamin B12 absorption
Each COA documents identity by HPLC and/or mass spectrometry, purity, and, where applicable, sterility and endotoxin levels, plus lot-specific storage guidance
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Calculations must use the form and mass basis stated on the lot label and COA