5 Clinical Trials for Various Conditions
The goal of this study is to determine if papaya fruits are an exceptionally good food source for carotenoids in humans, particularly when compared more common carotenoid sources like carrots and tomatoes. This objective will be accomplished by quantitation of the immediate post-prandial plasma concentrations of parent carotenoids and vitamin A metabolites from subjects who consumed a meal containing fresh papaya, tomato, and carrot.
The goal of the research study is to measure and compare the absorption of equivalent amounts of beta-cryptoxanthin and Iycopene provided in citrus fruit. The investigators want to determine whether adults absorb beta-cryptoxanthin to a greater extent than lycopene, when both are supplied in comparable citrus fruits.
- list item one, Peppers We propose to evaluate bio absorption of pepper carotenoids in a red bell-pepper or non-pungent green jalapeno pepper. The pepper will be provided in a cooked dish. The specific aims of this study are: 1) to determine blood response kinetics of lutein following multiple doses of non-pungent green jalapeno pepper with meals. 2) to determine blood response kinetics of zeaxanthin/capsanthin following multiple doses of red bell pepper with meals. We will feed 16 healthy man and women (50 - 65 y, females were at least one year post menopause), each cooked green jalapeno pepper or red pepper for 4 days and donate blood samples up to 21 days to determine blood response kinetics of xanthophylls following multiple doses of pepper dishes.
This investigation protocol uses an isotope reference method to evaluate bioavailability of ß-C in rice and its bioconversion to vitamin A. A well-nourished population will be fed hydroponically grown Golden Rice containing \~ 1 mg of β-carotene at day 8 after a reference dose of vitamin A at day 1. The blood samples will be collected up to 33 days after the doses. The absorption kinetics will be determined by tracking both vitamin A and β-carotene in human serum. Blood responses to Golden Rice β-carotene will be determined and evaluated. The vitamin A value of Golden Rice can thus be quantitatively determined.
The 2010 Dietary Guidelines for Americans emphasizes consumption of 4.5 cups of fruits and vegetables daily but the average intake of US adults is only 2.6 cups. This low consumption of fruits and vegetables results in a limited availability of certain nutrients found in these foods such as carotenoids. Dietary carotenoids have health-promoting properties and are known to fight against disease. Although, maintaining adequate vitamin D status is critical for overall skeletal health and the prevention of osteoporosis, vitamin D insufficiency is also widespread in the United States. Eggs, egg yolk in particular, are known to be a good source of lipid and may improve the absorption of carotenoids and vitamin D found in co-consumed vegetables in young and older women. Therefore, the investigators are interested to see if consuming eggs with cooked vegetables will increase carotenoids and vitamin D absorption.