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Oxisterol determination in selected coffees

E Turchetto1, G Lercker, R Bortolomeazzi

  • 1Centro Ricerche sulla Nutrizione, Facoltà di Medicina, University of Bologna, Italy.

Toxicology and Industrial Health
|May 1, 1993
PubMed
Summary
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This study found that oxidized phytosterols (oxisterols) are generally absent or present at very low, non-toxic levels in commercial coffees, including decaffeinated varieties. This suggests coffee

Area of Science:

  • Food Chemistry
  • Nutritional Science
  • Analytical Chemistry

Background:

  • Coffee quality, particularly taste and flavor, is significantly impacted by oxidative alterations during processing like roasting.
  • Oxidative by-products in food can affect nutritional safety and shelf-life, with some cholesterol oxidation products being toxic.
  • Oxidized phytosterols (oxisterols) have largely been overlooked regarding their potential health implications in food products.

Purpose of the Study:

  • To investigate the presence and levels of oxisterols in regular and decaffeinated commercial coffee samples.
  • To assess the toxicological significance of detected oxisterols in coffee.

Main Methods:

  • Analysis of commercial regular and decaffeinated coffee samples.
  • Detection and quantification of oxidized phytosterols (oxisterols).

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Main Results:

  • Oxisterols were absent in some coffee samples.
  • Traces of oxidized phytosterols were detected in other samples.
  • Detected oxisterol levels were significantly below the toxicologically active threshold.

Conclusions:

  • Commercial coffee, including decaffeinated versions, generally contains negligible or no amounts of potentially harmful oxisterols.
  • The findings suggest that oxisterols in coffee do not pose a significant toxicological risk to consumers.
  • Further research could explore oxisterol formation during different coffee processing stages.