Well , then they are very amped up , they're , they are very , very alert . Caffeine increases alertness by increasing epinephrine adrenaline release both in the brain and within the body . And so that's another way that it facilitates focus and concentration .
And that a number of people I know that I've suggested to also enjoy ya mate or caffeine also have other additional benefits . In particular , the caffeine in Yorba mate and coffee and other sources of caffeine are known to increase the density and efficacy . That is the number and the function of dopamine receptors .
And caffeine also operates on the epinephrine , the adrenaline system . In fact , if we ingest too much caffeine , we'll sometimes get the jitters . Those jitters are really the sympathetic as it's called nervous systems bias toward movement .
And this has been shown in humans several times . So by ingesting caffeine pretty regularly , you're actually increasing the ability of dopamine to have this effect of increasing motivation and drive . I tend to ingest caffeine only early in the day .
Uh in fact , or at least anxious . So be cautious with your use and adopting of caffeine if you're not already caffeine adapted , but most people do quite well to ingest 100 to 200 mg of caffeine prior to doing some focused work . And again , I recommend delaying your caffeine intake to 90 to 100 and 20 minutes after waking unless you are using that caffeine to really jolt your system .