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  • Title: Beta-carotene concentrations in maternal and cord blood of smokers and non-smokers.
    Author: de Barros Silva SS, Rondó PH, Erzinger GS.
    Journal: Early Hum Dev; 2005 Apr; 81(4):313-7. PubMed ID: 15814214.
    Abstract:
    BACKGROUND: Smoking in pregnancy can cause a reduction in the transport of beta-carotene across the placenta, consequently reflecting on the concentrations of this micronutrient in the newborn baby. AIMS: This study determined the concentrations of beta-carotene in maternal blood and umbilical cord blood in a group of smokers and non-smokers. DESIGN AND SUBJECTS: A total of 215 women and respective newborn babies were selected from a hospital in Joinville city, Brazil, between July and November 2002. Women were divided in two groups according to their smoking habits. beta-Carotene concentration was determined by high-performance liquid chromatography (HPLC). The difference between mean concentrations of beta-carotene in maternal blood and cord blood, in smokers and non-smokers, was determined by analysis of variance (ANOVA). The Student's t-test compared mean concentrations of beta-carotene in maternal blood and cord blood, and the mean ingestion of foods rich in beta-carotene by smokers and non-smokers. RESULTS: There was a statistical significant difference between the concentrations of beta-carotene in maternal blood (S=0.271 micromol/L, NS=0.450 micromol/L; P=0.001) and cord blood (S=0.028 micromol/L, NS=0.045 micromol/L; P=0.001) in smokers (S) and non-smokers (NS). The mean concentration of beta-carotene was significantly higher in maternal blood (0.398 micromol/L) than in cord blood (0.041 micromol/L) (P<0.001). The intake of foods rich in beta-carotene was lower in smokers, than in non-smokers (P=0.04). CONCLUSIONS: The concentrations of beta-carotene in maternal blood and cord blood were influenced by the use of tobacco.
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