I’m a big fan of nootropics, but they are getting increasingly hard to find… inflammation control is key, so a good dose of high-quality HDA/EPA fish oil is a solid foundation, as well as curcumin.
Gut health is intrinsically related to brain function as well, as most of the neurotransmitters are manufactured in the gut. David Perlmutter’s books on brain health are very good reading for this, as is anything by William Davis on the topic of gut health… his work with L. Reuteri yogurt is fascinating, and it’s very easy to make in an Instant Pot…
Check out the book Nutrient Power by William Walsh, it’s the best intro I’ve ever found about neuro functioning and nutrition… the section on behavioral changes with zinc/copper regulation alone makes the book worth the read. Absolutely fascinating.
On the tech side, properly implemented neurofeedback brain training is pretty effective, and daily meditation has some very well documented effects. Emily Fletcher and Dawson Church are my recommended authors on that topic.
I have very good mental clarity in a ketogenic state, but I feel better overall on a low carb/high protein diet rather than a keto diet, so take that as you wish.