American Journal of Clinical Nutrition, Vol 62, 104-109, Copyright © 1995 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Erythrocyte and plasma B-6 vitamer concentrations of long-term tobacco smokers, chewers, and nonusers

DW Giraud, HD Martin and JA Driskell
Department of Nutritional Science and Dietetics, University of Nebraska- Lincoln 68583-0806, USA.

Erythrocyte and plasma B-6 vitamer concentrations were determined in males aged 25-55 y who were long-term smokers, chewers, or nonusers. Tobacco users had either smoked (n = 23) or chewed (n = 11) for > 15 y; nonusers (n = 11) had never smoked or chewed. All subjects had normal hematocrit values. Food energy, protein, and vitamin B-6 intakes of the three groups of subjects were not significantly different. All subjects had fasting plasma pyridoxal-5'-phosphate (PLP) concentrations indicative of adequacy. Erythrocyte B-6 vitamer and 4-pyridoxic acid (4- PA) concentrations of all three groups were not significantly different. Nonusers had significantly higher plasma PLP concentrations than did smokers, whereas PLP concentrations of chewers were intermediate between the two groups. Chewers had significantly higher concentrations of plasma pyridoxamine-5'-phosphate (PMP) than other groups. Plasma pyridoxal, pyridoxine, pyridoxamine, and 4-PA concentrations of the three groups were not significantly different. Differences in some B-6 vitamer concentrations in plasma but not in erythrocytes were observed between tobacco users and nonusers.

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