Vitamin C and cigarette smokers.
D000328:Adult; D000367:Age Factors; D001205:Ascorbic Acid / Q000097:blood / Q000378:metabolism*; D001682:Biological Availability; D002170:Canada; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009751:Nutritional Requirements; D012737:Sex Factors; D012907:Smoking; D013997:Time Factors
D001205:Ascorbic Acid