Intake of Lutein and Zeaxanthin Differ with Age, Sex, and Ethnicity.
Summary of "Intake of Lutein and Zeaxanthin Differ with Age, Sex, and Ethnicity."
Lutein and zeaxanthin are carotenoids that are selectively taken up into the macula of the eye, where they may protect against development of age-related macular degeneration. Accurate assessment of their intakes is important in the understanding of their individual roles in eye health. Current dietary databases lack the appropriate information to ascertain valid dietary intakes of these individual nutrients. The purpose of this research is to determine intakes of lutein and zeaxanthin separately in the National Health and Nutrition Examination Survey (NHANES) 2003-2004. The top major food sources for lutein and zeaxanthin intake in NHANES 2003-2004 were analyzed for lutein and zeaxanthin by high-performance liquid chromatography from June to August 2006. Results were applied to dietary data from 8,525 participants in NHANES 2003-2004. Lutein and zeaxanthin food contents were separated into lutein and zeaxanthin in the nutrient database. Mean intakes from two nonconsecutive 24-hour recalls were grouped into food groups based on nutrient composition; these were matched to the new database, and lutein and zeaxanthin intakes were calculated separately. Among all age groups, both sexes, and all ethnicities, intakes of lutein were greater than of zeaxanthin. Relative intake of zeaxanthin to lutein decreased with age, with zeaxanthin to lutein ratios lower in females. Zeaxanthin to lutein ratios in Mexican Americans was considerably greater than other ethnicities (other Hispanics, non-Hispanic white, non-Hispanic black, other races). Lower zeaxanthin to lutein ratios were measured in groups at risk for age-related macular degeneration (eg, older participants, females). Our findings suggest that the relative intake of lutein and zeaxanthin may be important to age-related macular degeneration risk. Future studies are needed to assess the individual associations of lutein and zeaxanthin in eye health.
This article was published in the following journal.
Name: Journal of the American Dietetic Association
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20800129
- DOI: http://dx.doi.org/10.1016/j.jada.2010.06.009
Medical and Biotech [MESH] Definitions
A carotenoid alcohol widespread in nature. It is present in egg yolk, algae, and petals of yellow flowers, among other sources.
By adjusting the quantity and quality of food intake to improve health status of an individual. This term does not include the methods of food intake (NUTRITIONAL SUPPORT).
The lack of sufficient energy or protein to meet the body's metabolic demands, as a result of either an inadequate dietary intake of protein, intake of poor quality dietary protein, increased demands due to disease, or increased nutrient losses.
The time frame after a meal or FOOD INTAKE.
Total number of calories taken in daily whether ingested or by parenteral routes.
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