Andrew Huberman· PhD
But in the context of supplementation, the increase in dopamine, acetylcholine and epinephrine that one can achieve from say 500 milligrams of L-tyrosine, 300 milligrams of Alpha-GPC and a cup of coffee is going to be substantially less than one would see for prescription drugs. So you're getting a modest effect that can similarly teach those brain circuits for focus and concentration how to engage better.