Magnesium and Vitamin D - as far as I can tell there is plenty of evidence about the need for supplementation and effectiveness of both.
Currently experimenting with L-theanine to see if it helps me work better.
Currently experimenting with L-theanine to see if it helps me work better.
Do also blood test every 6 weeks of 25ohd to detect if your dose is sufficient. And don't forget to take 10 minutes of Sun while it's in its Zenith to get vitamin D dissolved in water.