Supplements like L-Tyrosine or caffeine can increase dopamine and visual focus but are less effective than behavioral tools at modifying neural circuitry.

“Using chemical assistance of a safe kind, of course, check with your doctor. But things like L-Tyrosine or caffeine or those combined, yes, it will increase dopamine and will increase our ability, to engage in visual focus somewhat. But those compounds alone, don't modify the circuitry in the way that we want.”