एडेनोसिन (en. Adenosine)

Caffeine exerts action on a substance produced by our brain, called adenosine, which controls the energy sensation of the body, decreasing brain activity and producing drowsiness.

By blocking adenosine, caffeine also stimulates the release of dopamine, a feel-good chemical that'll make you feel happy, less sluggish and more content with life.

It is vital to the production of ATP (adenosine triphosphate), especially in the heart.

Adenosine 5'-triphosphate disodium is another active ingredient that directly affects muscle building and can help you to develop an athletic body.

In the relaxed state, the actin filaments interdigitate with myosin filaments only to a small extent but when the muscle contracts, they interdigitate to a great extent due to the presence of ATP (adenosine triphosphate).

If you want your muscles to remain constantly tense during training, you need a lot of ATP (adenosine triphosphate, responsible for the energy of contraction).

Adenosine makes you drowsy and depresses the central nervous system when it binds to the receptors, but when caffeine is present, it leaves fewer of these transmitters for adenosine, which "speeds up" your brain activity.