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MS / MS conditions: MS analysis was performed on a 3200 QTRAP mass spectrometer (AB SCIEX, Concord, ON, Canada) using Analyst 1.4.2 software
When the food is swallowed, a substance in saliva called R-protein a protein that protects B12 from being destroyed by stomach acid travels to the stomach along with the food
Some medicines, such as insulin and some kinds of blood-thinners, are injected only under the skin
Once mixed with liquid, refrigerate and use within 30 days, avoiding repeated freezing and thawing
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