Effects of smoking and oral contraception on plasma β-carotene levels in healthy women
Oral contraceptive use and smoking have been known to affect plasma vitamin levels. Total carotenoids have been studied with spectrophotometry, a relatively insensitive technique. In this study plasma concentrations of β-carotene and retinol were measured in coded samples by sensitive high-pressure...
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Veröffentlicht in: | American journal of obstetrics and gynecology 1989-10, Vol.161 (4), p.881-885 |
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