Polyphenols from fruit and veggies have a vital impact on our health and its ability to deal with life challenges. Our brain has a big advantage as well. One of the reasons is that polyfenols in high doses have an influence on protein BDNF (Brain-Derived Neurotrophic Factor). BDNF is involved, among other things, in communication between your brain cells, which are related to learning and memory. Our unhealthy lifestyle, such as chronic stress, burnout and insomnia, lower the levels of BDNF that can lead to cognitive decline and brain shrinkage. To avoid this, you need to take care of yourself through the changes in your lifestyle, including food.
There is a number of studies that investigated an influence of various food groups in high doses (> 1000 mg) on BDNF. The winner in consistent results and significant influence on BDNF so far seems to be coffee fruit extract. Only 100 mg of coffee fruit extract increases BDNF levels by 143 % (!) in the hours following the consumption in healthy middle-aged adults. The researchers believe that this is due to either a high amount of procyanidins or a unique combination of different polyfenols in coffee fruit extract.
Curious? Here is the source: https://www.tandfonline.com/doi/abs/10.1080/1028415X.2021.1913953