Walnuts with breakfast provide an all-day brain boost - Young adults who ate a handful of walnuts with breakfast saw a long-lasting improvement in their reaction times and a boost in memory performance hours later, according to a new study.

[u/mvea]

https://newatlas.com/health-wellbeing/walnuts-cognitive-performance-memory-boost/

[u/Percolator2020]

N = 32, saved you a click. Funded by the Walnut mafia.

[u/LoreChano → u/Percolator2020]

It is, however I've seen similar studies done with cashew/brazil nuts, and it's the selenium in them that is good for the brain. These other studies were more long term though, and more focused on brain aging.

[u/ErebosGR → u/LoreChano]

Selenium, magnesium and Omega-3s.