I am not a big fan of supplements, but I am in my 50s and I take NAC (N-Acetylcysteine) daily for its neurological benefits: https://examine.com/supplements/n-acetylcysteine/
scroll down to Section 3 Neurology
I also havent traded in 5 years without my 100mg morning dose of Modafinil
I take a break from it on weekends to ensure my perspective stays balanced
The benefits of the above seem to be nullified by poor diet, inadequate sleep and lack of exercise
