Dietary Intervention and Nutrient Levels in Multiethnic Populations
Author Information
Author(s): Eliassen A. Heather, Colditz Graham A, Peterson Karen E, Furtado Jeremy D, Fay Martha E, Sorensen Glorian, Emmons Karen M
Primary Institution: Harvard Medical School
Hypothesis
Does dietary intervention affect plasma nutrient concentrations in multiethnic populations?
Conclusion
The study found significant differences in plasma nutrient concentrations between intervention and usual care groups, indicating the intervention's impact on dietary intake.
Supporting Evidence
- Participants in the intervention group had higher plasma concentrations of retinol and α-carotene.
- Self-reported multivitamin users had significantly higher concentrations of several nutrients.
- Those consuming more fruits and vegetables had higher levels of lutein and zeaxanthin.
Takeaway
This study looked at how changing diets can affect the nutrients in our blood, showing that people who followed the diet had better nutrient levels.
Methodology
Participants completed questionnaires and provided blood samples to measure plasma nutrient concentrations.
Potential Biases
Self-reported dietary changes may reflect intervention-related bias rather than actual changes.
Limitations
The study only collected postintervention blood samples, preventing assessment of changes from preintervention to postintervention.
Participant Demographics
Participants had a mean age of 47.7 years, 49% were female, and 69% were white.
Statistical Information
P-Value
P = .01 for retinol, P = .03 for α-carotene
Statistical Significance
p<0.05
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