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Raisins contain a significant amount of dietary fiber and polyphenolic compounds that represent an important substrate for microbiota fermentation which generates potentially beneficial end products, such as short-chain fatty acids. The mammalian gut contains a phylogenetically as well as functionally diverse microbiota that contributes to host physiology. To date, little is known about how increased raisin intake affects human gut microbiota composition.
This research study will assess the effects of adding raisins to the diet of healthy adults on the bacteria from feces of human subjects and resulting self-reported GI symptoms as well as markers of immune function. The hypothesis is that by adding raisins to the diet this will result in changes in gut microbiota. Furthermore, the changes in microbiota will largely be beneficial, as evaluated by an increase in butyrate producers and bacteria associated with anti-inflammatory properties.
The research study design is a 14 day international focus on increasing raising intake. Participants will be provided with a commercial raisin product for a 14 day period. Participants will consume 2 servings/day (84g of raisins). While participants will be told to substitute raisins for other diet ingredients, they will be free to choose what to substitute according to their preferences. Participants will keep daily food records and will be told that raisin consumption will be monitored in their fecal samples (qPCR). Fecal samples will be collected before the start (Day1), during (Day5-7) and at the end (Day 12-14) of the intervention using a stool collection kit (Sigma). Participants will complete a GI health questionnaire on a weekly basis to determine tolerance to increased raisin intake.
Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label
Emerging Pathogens Institiute
University of Florida
Published on BioPortfolio: 2016-03-21T06:01:25-0400
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