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Novel Metabolites of Beta-Carotene and Lycopene

NCT02550483 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 36

Last updated 2018-04-26

No results posted yet for this study

Summary

The study (n = 36) will be a parallel design and will be 6 weeks in duration. Participants will start with a 2-week free-living wash-in period where they will be asked to avoid certain carotenoid-rich foods, followed by 4 weeks of a completely controlled diet. In addition to the controlled diet, participants will consume one of three beverages (300 mL/day; n = 12/group): placebo beverage (control), high beta-carotene tomato juice, and high-lycopene tomato juice. Blood, urine and feces will be collected throughout the study.

Conditions

  • Healthy

Interventions

OTHER

Base diet + high beta-carotene tomato juice

Participants will receive high beta-carotene tomato juice daily in addition to the base diet. Meals will be prepared using traditional American foods with a macronutrient composition representative of a typical American diet. The base diet will be low in betacarotene and lycopene (no carrots, sweet potato, tomatoes, and dark greens). During the controlled diet period, participants will be instructed to eat all foods and only foods provided to them, with the exception of water, coffee, tea, and diet soda.

OTHER

Base diet + high lycopene tomato juice

Participants will receive high lycopene tomato juice daily in addition to the base diet. Meals will be prepared using traditional American foods with a macronutrient composition representative of a typical American diet. The base diet will be low in betacarotene and lycopene (no carrots, sweet potato, tomatoes, and dark greens). During the controlled diet period, participants will be instructed to eat all foods and only foods provided to them, with the exception of water, coffee, tea, and diet soda.

OTHER

Base diet + placebo beverage

Participants will receive a placebo beverage daily in addition to the base diet. Meals will be prepared using traditional American foods with a macronutrient composition representative of a typical American diet. The base diet will be low in betacarotene and lycopene (no carrots, sweet potato, tomatoes, and dark greens). During the controlled diet period, participants will be instructed to eat all foods and only foods provided to them, with the exception of water, coffee, tea, and diet soda.

Sponsors & Collaborators

  • USDA Beltsville Human Nutrition Research Center

    lead FED

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
21 Years
Max Age
75 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2015-09-30
Primary Completion
2015-11-30
Completion
2015-11-30

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02550483 on ClinicalTrials.gov