Studies related to Contentment and Grape juice

Cognitive And Mood Improvements Following Acute Supplementation With Purple Grape Juice In Healthy Young Adults

Effect None
Values Bond-Lader. Mean and SD. Placebo: before 61.7 (14), after 60.3 (13.3). Grape: before 65 (13.6), after 63.8 (13.6).
Trial Design Randomized trial
Trial Length 24 hours
Number of Subjects 20
Sex Both Genders
Age Range 18-29, 30-44
Notes for this study:
In a randomized, double-blind, placebo-controlled crossover trial, 20 healthy participants were allocated to 230 ml of juice which containing 200 ml of Concord grape juice, and 30 ml of blackcurrant juice, or 200 ml of white grape juice, 10 ml of black currant, and 20 ml of water daily 20 minutes prior to cognitive testing

Using Computerised Mental Performance Assessment System (COMPASS), the purple grape group saw a modest improvement in reaction time on attention tasks and significantly greater calmness, though no notable differences in memory, alertness, or contentedness.
Funding issues for this study:
Using Welch’s, no funding sources declared. Researchers declare no conflicts of interest.