Lutein Bioavailability From Fresh and Dried Beverages

Not Applicable

Completed

• Conditions: Macular Pigment

• Registration Number: NCT01400763
• Lead Sponsor: Wageningen University

Brief Summary

Macular pigment is composed primarily of the xanthophylls lutein and zeaxanthin, which are members of the carotenoid family. Epidemiological evidence indicates that a higher intake of lutein and zeaxanthin is associated with a lower risk to develop age-related macular degeneration (AMD). The lipid matrix of an egg yolk is an excellent vehicle for the efficient absorption of dietary lutein and it is possible to increase the natural lutein concentration in an egg yolk. A fresh lutein-enriched egg yolk beverage has been produced using these lutein-enriched egg-yolks. However, this beverage has a limited shelf life of maximum three weeks. Drying this fresh beverage extents the shelf live, however, this should be without loosing its functional properties concerning lutein bioavailability. At WUR-FBR two types of drying procedures have been evaluated resulting in two different dried product formulations, which need to be tested. The question is, whether the lutein bioavailability is not affected by different drying procedures.

Detailed Description

Not available

Study Timeline

• Study Start: 2011-05
• Status Verified: 2011-07
• Primary Completion: 2011-07
• Study Completion: 2011-07
• Study First Submitted: 2011-07-20
• Study First Submitted QC: 2011-07-21
• Last Update Submitted: 2011-07-21
• Study First Posted: 2011-07-22
• Last Update Posted: 2011-07-22

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 103

Inclusion Criteria

• age 18-35 years
• BMI 18-25 kg/m2
• body weight should be stable for ≥6 months (with no weight gain/loss > 3 kg)

Exclusion Criteria

• use of medication except incidental use of pain killers
• pulmonary inhalation medication and except usage of the contraceptive pill
• chronic diseases such as IBD or other stomach or bowel diseases
• not willing to discontinue consumption of vitamin supplements
• allergic to cow milk / dairy products/ eggs/ egg-rich products
• vegetarians
• smoking
• pregnant or breastfeeding women
• having donated blood (as blood donor) within 1 month prior to the screening
• visit or planning to do so during the study
• impossible or difficult venapuncture

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Serum lutein concentration	six weeks after intervention

Secondary Outcome Measures

Name	Time	Method
Serum lipid concentrations	six weeks after intervention