This amino-acid is found in green tea and it has a very similar structure to glutamic acid. As it is a substance that crosses the blood-brain barrier, it produces plenty of effects at a central level. Among these effects, it's a great sedant, reducing anxiety and improving concentration, hence its combination with caffeine. In addition, by slightly acting on GABA levels, is associated with a hypnotic effect without affecting the hypnogram.

  Loading...