How is vitamin B12 absorbed?
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In food, vitamin B12 is attached to a protein that must be removed in the stomach by gastric acid and an enzyme called pepsin. Once B12 is free, a binding protein attaches to it and protects it while it's transported to the small intestine. Once in the small intestine, a substance called intrinsic factor takes B12 from the binding protein and allows it to be absorbed into the blood, where it functions in promoting health.
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A doctor’s prescription calls for the creation of pills that contain 12 units of vitamin B12 and 12 units of vitamin E. Your pharmacy stocks three powders that can be used to make these pills: one contains 20% vitamin B12 and 30% vitamin E; a second, 40% vitamin B12 and 20% vitamin E; and a third, 30% vitamin B12 and 40% vitamin E. Create a table showing the possible combinations of each powder that could be mixed in each pill.