Participants in this arm will consume muscadine wine polyphenol for six weeks and then placebo for another six weeks. The two phases are separated by a 21-day washout period

Participants in this arm will first consume placebo for six weeks and then muscadine wine polyphenol for another six weeks. The two phases are separated by a 21-day washout period

dealcoholized muscadine wine with alcohol content <0.5% with addition of 50ppm of sodium metabisulfite for preservation

Participants will complete the NIH Toolbox cognitive battery. The test battery incorporates multiple tests that assess various aspects of cognitive performance. The list of tests and the function they measure are the following.1. Flanker inhibitory control and attention test (executive function): scoring is based on a combination of accuracy and reaction time. A 2-vector scoring method is employed that uses accuracy and reaction time, where each of these vectors ranges in value between 0 and 5, and the computed score, combining each vector score, ranges in value 0-10. The higher the score the better the performance. 2. Dimensional Change Card Sort (cognitive flexibility): scoring is the same as Flanker's test.

3. Picture Sequence Test (episodic memory): Item Response Theory (IRT) is used to score this test. score known as a theta score is calculated for each participant; it represents the relative overall ability or performance of the participant. A theta score is very similar to a z-score, which is a statistic with a mean of zero and a standard deviation of one. The higher the score, the better the performance. 4. List Sorting Test (working memory: scored by summing the total number of items correctly recalled and sequenced on the tests, which can range from 0-26. 5. Pattern and Comparison Test (processing speed): The participant's raw score is the number of items answered correctly in 85 seconds of response time, with a range of 0-130. higher score means better performance. Both individual test scores and composite scores will be compared to baseline score

6. Rey's Auditory Verbal Learning Test assesses immediate and delayed (30min) recall of a given list of words that is repeated 5 times. The number of correct words recalled and intrusion words (extraneous word offered by the participant that does not appear on the list) are recorded for scoring

Participants will complete the NIH Toolbox emotion battery. The test battery include two self-report measure,

1. Positive affect survey (assess mood): 5-point scale with options ranging from "not at all" to "very much." higher scores are indicative of more positive affect
2. Fear-Affect Survey (assess anxiety): 5-point scale with options ranging from "never" to "always." higher scores are indicative of more feelings of fear and anxiety