Effects of Concord Grape Juice Alone on Glycemia, Appetite and Cognitive Function in Healthy Adults

Effects of Concord Grape Juice Alone on Glycemia, Appetite and Cognitive Function in Healthy Adults

Assess the impact of 100% grape juice on postprandial glycemic response and subsequent appetite, food intake and cognitive function.

Investigators earlier clinical work and published literature suggest that the phenolic content and strong flavor intensity of 100% Concord grape juice hold potential beneficial effects on appetite and glycemia. Investigators aim to better understand the use of 100% grape juice modifies appetite and glycemia acutely and over the day using a 24 hour glucose monitor.

Inclusion Criteria:

• BMI between 25.0-34.9 kg/m2
• Willingness to eat all test foods
• Low consumer of tea and coffee, willingness to refrain from both during the 48 hours prior to test days and on the test day.
• Fasting blood glucose below 6.1mmol/l via capillary finger-stick blood sample using a SureStep glucometer (Lifescan, Milpitas, CA)

Exclusion Criteria:

• Taking medications known to affect glycemia, lipid metabolism or appetite
• Body weight fluctuation of >5kg in the past 3 months
• Taking vitamin or other supplements
• Smokers
• Acute or Chronic disease