"Vitamin C intake has been associated with improved mood, vitality, well-being, and lower depression, while vitamin C deficiency is associated with higher depression and cognitive impairment. Participants took daily either a vitamin C supplement, placebo, or two kiwifruit. They then reported their vitality, mood, flourishing, sleep quality, sleep quantity, and physical activity using smartphone surveys. The researchers found kiwifruit supplementation improved vitality and mood within four days, peaking around 14–16 days, and improved flourishing from day 14. Vitamin C, on the other hand, marginally improved mood until day 12."
This research was funded by the University of Otago [New Zealand University] and Zespri International [a kiwifruit grower cooperative].
https://www.otago.ac.nz/news/newsroom/furry-fruit-improves-mental-health-fast
Furry fruit improves mental health – fast
25 January 2024
Kiwifruit has proven itself as a powerful mood booster and new research from the University of Otago has shown just how fast its effects can be.