For vitamin B12 to be absorbed by the body, it must become bound to an intrinsic factor , a protein secreted by cells in the stomach.
(vitamin B12; to be absorbed; by the body) (it; must become; bound to an intrinsic factor) (it; bound; ) (a protein; secreted; by cells in the stomach)
vitamin B12 it it a protein
to be absorbed must become bound secreted
by the body
bound to an intrinsic factor
by cells in the stomach