Start Date: Sep 15, 2011
End Date: Sep 14, 2016
The Grand Forks Human Nutrition Research Center (GFHNRC) studies healthy diets based on the Dietary Guidelines and how they can help people maintain a healthy body weight, as well as prevent obesity and other chronic health problems. Fruits and vegetables are an important component to a healthy diet and many Americans do not eat the recommended amount of fruits and vegetables. There are many research efforts looking at ways to increase consumption of fruits and vegetables, however, there is a need to develop better ways to assess fruit and vegetable intake in people. Validation of skin carotenoid detection as a marker of fruit and vegetable intake will be accomplished through a controlled feeding study conducted at the GFHNRC. Study volunteers will be fed (on an outpatient basis) a diet initially devoid of carotenoids (“wash-out period”) followed by a diet rich in carotenoids. A skin carotenoid detection device will be used to monitor skin carotenoid levels in response to increases in intake of vegetables and fruits.