Caffeine has been used for controlling migraine headaches. Caffeine has been used because it dilates blood vessels and thus relieves the suffering from the migraine. So if you balance your intake of caffeine and replace what the caffeine depletes, such as Uptime does, then the end result is mental alertness, clarity, and energy. The problem with caffeine and coffee is that most people drink blended coffee which means anything grown below 3500 feet is very heavily pesticide-sprayed. Most people buy blended coffee, take it home, fill the pot with tap water, boil it, pour themselves a cup of coffee, and what they get is the tars, oils, pesticides, fluoride, chloride, and everything that is negatively associated with the coffee.
Caffeine is a driver.
It drives things into the system. That's why it is used as a base in pharmaceutical drugs. So the key is to know your source of caffeine. Again, we'll go back to controlling the blood sugar. That's the key.