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Carotenoid interactions.

H van den Berg1

  • 1Department of Physiology, TNO Nutrition and Food Research Institute, Zeist, The Netherlands.

Nutrition Reviews
|February 27, 1999
PubMed
Summary
This summary is machine-generated.

Carotenoid interactions, particularly between beta-carotene and other carotenoids like lutein and lycopene, affect absorption and metabolism. Mechanisms include competition and inhibited cleavage, though findings vary.

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Area of Science:

  • Nutrition Science
  • Biochemistry
  • Human Physiology

Background:

  • Carotenoid interactions during absorption and metabolism are suggested by various studies.
  • Evidence points to interactions between beta-carotene and oxycarotenoids (e.g., canthaxanthin, lutein), and hydrocarbon carotenoids (e.g., beta-carotene, lycopene).

Purpose of the Study:

  • To review existing studies on carotenoid interactions.
  • To explore potential mechanisms and implications of these interactions.

Main Methods:

  • Review of animal and human feeding/supplementation studies.
  • Inclusion of in vitro studies on intestinal beta-carotene cleavage.
  • Analysis of discrepant findings regarding interaction magnitude and direction.

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Main Results:

  • Interactions are observed between beta-carotene and oxycarotenoids, and between beta-carotene and lycopene.
  • Evidence for these interactions is equivocal, with conflicting results across studies.
  • Likely mechanisms include competition for micellar incorporation, lipoprotein exchange, and inhibited beta-carotene cleavage.

Conclusions:

  • Carotenoid interactions are complex and influenced by multiple factors.
  • Understanding these interactions is crucial for optimizing carotenoid supplementation and dietary recommendations.
  • Further research is needed to resolve discrepancies and elucidate precise mechanisms.