That is because caffeine blocks adenosine, which is a chemical in the body that tells it to shut down when tired. Caffeine testing is one way that some people take up in order to measure the amount of caffeine they consume in a day.

It is com knowledge that drinking too much coffee can lead to experiencing the jitters, as well as insomnia. After the initial caffeine high, the bad things that caffeine is known for sets in. Five Negative Side Effects of Caffeine Caffeine is good because it gives you a popping burst of energy and can keep you on your toes at least for a couple of hours. Some of the negative side effects. One cannot have too much caffeine without feeling its side effects at least two hours after the intake. However, keeping the adenosine in the body continuously blocked is not something to be desired. But these two are not the only side effects that you can encounter when having too much caffeine in your system.

They either buy caffeine testing products or make use of online daily caffeine intake calculators.