“ Ascorbate (50 μM) also blocked acetylcholine‐induced , EDHF‐mediated vasodilator responses in the rat mesenteric arterial bed in a time‐dependent manner (maximum blockade at 180 min).”
“In the bovine eye, EDHF‐mediated vasodilator responses induced by acetylcholine or bradykinin were powerfully blocked when ascorbate (50 μM) was included in the perfusion medium for at least 120 min; with acetylcholine a normally‐masked muscarinic vasoconstrictor response was also uncovered.”