- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT02679794
Impact of Egg Consumption on Carotenoid and Vitamin D Bioavailability in Pre- and Post-menopausal Women
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
The 2010 Dietary Guidelines for Americans emphasizes consumption of 4.5 cups of fruits and vegetables daily. However, US adults only consume on average 2.6 cups of fruits and vegetables daily. This low consumption may further result in the limited availability of fat soluble, health-promoting, phytochemicals such as carotenoids (CAT) from these foods. Dietary CAT have beneficial biological properties including antioxidant and anti-inflammatory effects and scientific research supports the protective effects of CAT against many degenerative diseases, including cardiovascular diseases, age-related macular degeneration, and some types of cancer. Therefore, either low intake or inefficient bioavailability of CAT from fruits and vegetables may reduce their potential effectiveness to retard or prevent disease. Recently completed randomized and crossover study found that co-consuming 150g (3 eggs) of scrambled whole eggs (SWE) which contains18g of lipid, increases overall CAT absorption from a mixed-vegetable salad >7-fold compared to a the same salad without eggs (3g of co-consumed lipid) in young healthy men. However, the occurrence of this benefit in women and older adults is unknown. Aging may affect CAT bioavailability due to age-induced physiological changes including reduced gastrointestinal tract function and modifications of chylomicron metabolism. Eggs are known to be a highly bioavailable source of CAT, presumably due to the presence of lipid and phospholipid in egg yolk. The highly bioavailable nature of CAT from eggs suggest that egg-derived factors may be leveraged to improve bioavailability of other CAT found in co-consumed vegetables. While promising, very limited data exist on the impact of a co-consumed food source of lipid to enhance CAT absorption in women or in older adults.
Vitamin D (VIT D) insufficiency is widespread with nearly 2/3 of Americans not meeting the current Institute of Medicine (IOM) recommendation for serum 25-hydroxyvitamin D (25(OH)D) concentration. VIT D has an essential function to regulate calcium homeostasis, including stimulating calcium's active intestinal absorption and renal excretion. Thus, maintaining adequate VIT D status is critical for overall skeletal health and the prevention of osteoporosis. Post-menopausal women are at high risk of having osteoporosis and this risk is reduced when adequate VIT D status is maintained. VIT D is fat-soluble and only a limited number of foods naturally contain it. Also, while VIT D absorption is enhanced by dietary lipid, the optimal amount of lipid required for maximal absorption has not been determined. A paucity of data exists regarding the effect of a co-consumed food source of lipid to enhance VIT D absorption and the impact of aging on VIT D bioavailability in women.
Type d'étude
Inscription (Réel)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
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Indiana
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West Lafayette, Indiana, États-Unis, 47907
- Purdue Clinical Research Center
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Pre- (regularly menstruating, aged 19-45y) and post-menopausal (aged 60+y) females
- weight stable (± 3 kg in the past 3 months)
- constant habitual activity patterns within last 3 months
- no acute illness
- not diabetic or have chronic diseases known to influence lipid or energy metabolism
- blood 25(OH)D>20 nmol/L
- non-smoking
- drinking no more than 2 alcoholic drinks per day
- not taking estrogen-based birth control or osteoporosis prevention or treatment medications in the past 3 months
- not taking lipid-lowering medications
Exclusion Criteria:
- Males
- age <19 or age >45y for pre-menopausal women and age <60y for post-menopausal women
- weight change>3 kg in the past 3 months
- exercising vigorously over the past 3 months
- intestinal disorders including lipid malabsorption or lactose intolerance
- abnormal liver or kidney function tests
- blood 25(OH)D<20 nmol/L
- fasting blood glucose>110 mg/dL
- smoking
- drinking more than 2 alcoholic drinks per day
- taking estrogen-based birth control or osteoporosis prevention or treatment medications in the past 3 months
- taking lipid-lowering medications affecting plasma cholesterol concentration
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Autre
- Répartition: Randomisé
- Modèle interventionnel: Affectation croisée
- Masquage: Seul
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
---|---|
Expérimental: Egg consumption
Consuming sautéed vegetables and 3g canola oil with 100g (2 large eggs) of whole eggs
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Subjects will consume a carefully portioned sautéed vegetables and 3g canola oil with 100g (2 large eggs) of whole eggs
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Comparateur placebo: Control
Consuming sautéed vegetables and 3g canola oil without eggs
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Subjects will consume a carefully portioned sautéed vegetables and 3g canola oil.
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
Contents of total and individual carotenoids in triglyceride-rich lipoprotein fractions
Délai: From hour 0 to hour 10
|
composite 0-10 h area under the curve of total and individual carotenoids (lutein, zeaxanthin, alpha-carotene, beta-carotene, lycopene) in triglyceride-rich lipoprotein fractions (all units are nmol/L x 10 hours)
|
From hour 0 to hour 10
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Vitamin D content in in triglyceride-rich lipoprotein fractions
Délai: From hour 0 to hour 10
|
composite 0-10 h area under the curve of vitamin D2, vitamin D3, 25(OH)D2, and 25(OH)D3 in triglyceride-rich lipoprotein fractions (all units are nmol/L x 10 hours)
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From hour 0 to hour 10
|
Collaborateurs et enquêteurs
Parrainer
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Autres numéros d'identification d'étude
- 1507016290
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