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Related Experiment Videos

Selected nutritional biomarkers predict diet quality.

Marian L Neuhouser1, Ruth E Patterson, Irena B King

  • 1Cancer Prevention, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, POB 19024, MP-702, Seattle, WA 98109-1024, USA. mneuhous@fhcrc.org

Public Health Nutrition
|October 14, 2003
PubMed
Summary
This summary is machine-generated.

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Biomarkers for dietary fatty acid densities among postmenopausal United States females derived using a habitual-diet human feeding study.

The American journal of clinical nutrition·2026

Biomarkers of nutrient intake, including vitamins and fatty acids, correlate with diet quality in postmenopausal women. Objective measures support the Diet Quality Index (DQI) for assessing dietary patterns.

Area of Science:

  • Nutritional science
  • Biochemistry
  • Public health

Background:

  • Diet quality is crucial for health, but objective measures are needed.
  • Nutrient biomarkers offer a way to assess dietary intake.
  • The Diet Quality Index (DQI) is a tool for evaluating diet quality.

Purpose of the Study:

  • To investigate the relationship between nutrient intake biomarkers and overall diet quality.
  • To validate the Diet Quality Index (DQI) using objective biomarkers.

Main Methods:

  • 102 healthy postmenopausal women completed a food-frequency questionnaire (FFQ).
  • Blood samples were analyzed for phospholipid fatty acids and serum nutrient concentrations (vitamins, carotenoids).
  • Multivariate linear regression modeled associations between nutrient biomarkers and DQI scores.

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Main Results:

  • Higher DQI scores (excellent diets) were associated with increased plasma vitamin C, alpha-tocopherol, and beta-cryptoxanthin.
  • Excellent diets were linked to lower levels of potentially atherogenic stearic and behenic acids.
  • Six biomarkers explained 36% of the variability in DQI scores.

Conclusions:

  • Objective nutrient biomarkers support the validity of the DQI for assessing dietary patterns.
  • The DQI is a useful tool for measuring diet quality in population studies.