Caffeine
Caffeine is a central nervous system stimulant and the most commonly used energy ingredient in the world. It has been thoroughly shown to reduce fatigue and drowsiness, improve reaction time, concentration, motor coordination as well as both aerobic and anaerobic athletic performance. Studies have also shown that small caffeine boosts are not only healthier but the best way to stay alert and focused throughout the day.
L-Theanine
L-Theanine is an amino acid found naturally in green teas, such as matcha, that has antioxidant and anti-inflammatory properties. It has a similar structure to glutamate, a neurotransmitter related to memory, and has been shown to increase dopamine and serotonin while exerting neuroprotective effects. In addition, the combination of L-Theanine and caffeine has been shown to increase alertness and help individuals focus their attention better during tasks. A scientific review on the combination of caffeine and L-theanine showed that it helps to maintain alertness, focus, attention, and accuracy, and also modulates the potential negative effects of caffeine.
L-Tyrosine
L-Tyrosine is one of the 20 naturally occurring amino acids in the body and is the precursor to the neurotransmitter dopamine. In a study on sleep deprivation, L-Tyrosine supplementation provided significant improvements to mathematical processing, memory, and logical reasoning. In another study by the US Naval Aerospace Medical Research Laboratory, L-Tyrosine proved useful in counteracting performance decrements during sustained work and sleep loss. L-Tyrosine has also been shown to reduce tension and fatigue and improve performance under stressful conditions.