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Related Experiment Videos

Bisphenol A levels in human urine.

Akiko Matsumoto1, Naoki Kunugita, Kyoko Kitagawa

  • 1Department of Environmental Health, University of Occupational and Environmental Health, Kitakyusyu, Japan.

Environmental Health Perspectives
|January 8, 2003
PubMed
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Urinary bisphenol A (BPA) levels were higher in students in 1992 compared to 1999. BPA levels correlated with coffee and tea intake in 1992, possibly due to changes in can coatings.

Area of Science:

  • Environmental Health
  • Analytical Chemistry
  • Endocrinology

Background:

  • Bisphenol A (BPA) is a known endocrine disruptor with reported estrogenic effects.
  • Controversy exists regarding BPA's in vivo effects and human exposure levels.
  • Assessing human exposure and its correlates is crucial for understanding health risks.

Purpose of the Study:

  • To develop and apply an analytical method for quantifying BPA and its conjugate in human urine.
  • To investigate temporal trends in urinary BPA levels in student populations.
  • To explore correlations between BPA levels and lifestyle factors like beverage consumption.

Main Methods:

  • Development of a high-performance liquid chromatography/fluorescence method for BPA analysis.
  • Collection of urine samples and lifestyle data (smoking, alcohol, coffee/tea) from two student cohorts (1992 and 1999).

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  • Statistical analysis to compare BPA levels between cohorts and correlate them with consumption habits.

    • Main Results:

    • Urinary BPA levels were significantly higher in the 1992 cohort compared to the 1999 cohort.
    • A positive correlation between BPA levels and coffee/tea consumption was observed in the 1992 cohort only.
    • No significant correlation was found between BPA levels and smoking or alcohol intake in either cohort.

    Conclusions:

    • Urinary BPA levels in university students have decreased over time.
    • Beverage consumption, particularly coffee and tea, may be a source of BPA exposure.
    • Changes in food packaging, such as can coatings, may have contributed to the observed decrease in BPA levels.