Stimulates and improves mood: Caffeine is an adenosine receptor antagonist. This means that it blocks these receptors and prevents them from being activated by adenosine. This prevents the feeling of drowsiness. It also increases the activity of dopamine, the neurotransmitter responsible for energy and motivation. L-theanine in turn increases GABA levels and acts as an antagonist of NMDA receptors, a type of glutamate receptor, the main excitatory neurotransmitter. Therefore, it prevents over-stimulation of the nervous system and reduces nervous tension. The combination of caffeine and L-theanine increases energy levels and prevents unpleasant symptoms such as irritability and agitation.

Supports the learning process: Research shows that caffeine increases the activity of the excitatory neurotransmitters responsible for cognitive abilities: dopamine and acetylcholine. Dopamine usually sets the right level of energy and motivation. However, optimal levels of this neurotransmitter also allow working memory to function smoothly and help focus on a specific topic. Acetylcholine is essential in the process of creating memories. L-theanine affects the bioelectrical activity of the brain by increasing the activity of alpha brain waves. They are a distinctive feature of a state called "relaxed attention," and their presence indicates that the brain is ready to absorb new information.

Improves intellectual performance:L-theanine has been shown to increase the expression of nerve growth factor (NGF), which stimulates the formation of new nerve cells and the connections between them . This effect is particularly evident in those areas of the brain that are involved in receiving information. It is also important that caffeine stimulates the brain's stimulating neurotransmitters, namely dopamine and acetylcholine. The first of them is very important for the so-called multifunctional work. Basically, it is the ability to smoothly shift your attention from one topic to another, allowing you to multitask. Adequate levels of acetylcholine, on the other hand, determine the speed at which the brain processes data and associates new information with previously learned information.