A 77-year-old man with symptomatic coronary atherosclerotic heart disease was admitted for elective coronary revascularization. He had a history of chronic obstructive pulmonary disease due to cigarette smoking and essential hypertension. He was managed on diuretics and a salt-poor, low-cholesterol diet. An echocardiogram revealed left ventricular hypokinesis and atrial enlargement. Wide and notched P waves in standard leads II and III of the electrocardiogram were considered to be related to his chronic obstructive pulmonary disease, which put him at risk for postoperative atrial fibrillation (AF). A cardiac consultant advised adding vitamin C (ascorbic acid) to his management.
Which of the following statements regarding vitamin C is/are correct?
vitamin C deficiency is rare in developed countries
vitamin C deficiency increases mortality
vitamin C deficiency is common in diabetics
vitamin C can be toxic in high doses
in the past, vitamin...