The brain is a very energy hungry and nutrient hungry organ.  It uses up to 10 times more energy than the rest of the body (at rest), or 20% of the energy supply.  Therefore, it makes sense that it is very important to feed it properly.  In fact, micronutrients (vitamins and minerals) can significantly impact mental health in a positive way, as discussed in The Better Brain:

https://thebetterbrainbook.com/

Among supplements that you can discuss with your healthcare provider, one of the safest and most effective is L Theanine (naturally occurs in Green Tea), which can help with anxiety, mood, and cognitive/focus:

https://thewell.northwell.edu/healthy-living-fitness/l-theanine-anxiety

https://pubmed.ncbi.nlm.nih.gov/31758301/
https://pubmed.ncbi.nlm.nih.gov/31623400/
https://pubmed.ncbi.nlm.nih.gov/27396868/