Wanted to write a little bit again. Healthy writing. And give some tips on Supplements and Herbs.
1.PQQ - My all time favorite Supplement for Focus, Alertness, and Mitochondria is PQQ taken with Bioperine and CoQ10. More on PQQ at www.selfhacked.com - Thats were i read most of the Benefits of nearly all Herbs and Supplements i'm taking and wondering about. This is awesome BRAINFOOD. https://www.selfhacked.com/blog/pqq-review/
The brands may vary. But i do like Jarrow Formulas products a lot. So that is Number one.
2 - Lions mane (MUSHROOM). Because it is an awesome mushroom with so much good. Memory and brain booster. 
https://www.selfhacked.com/blog/all-about-lions-mane/
3 - Ashwagandha (HERB) 
4 - Bacopa Monnieri - (HERB) https://www.selfhacked.com/blog/bacopa-monnieri-4/
Have a lot more than these to add. Coming in later posts :)
I like Jarrow products generally, too... I don't take PQQ or CoQ10 but pretty sure I get a decent amount from food.
YES LION'S MANE
Haven't tried the other two, but some low hanging fruit imo is seafood and turmeric/curcumin + black pepper.
actually have to check if i get enough via food. But it does help taking Turmeric and Black pepper with it. and in foods too. Love ayurveda herbs and foods / spices. About PQQ i feel it takes away muscle pain and brain fog. Used for years and notice when i dont take it. So no doubts. :) YES mushrooms are awesome. Reishi, Chaga, Cordyceps, hehe and food mushrooms. LOVE all Shrooms :D