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

Supports learning process: Research indicates that caffeine increases the activity of excitatory neurotransmitters that are responsible for cognitive abilities: dopamine and acetylcholine. Dopamine generally determines appropriate levels of energy and motivation. However, the optimal level of this neurotransmitter also enables the working memory to function smoothly and helps to focus attention 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 proven to increase expression of nerve growth factor (NGF) which stimulates the formation of new nerve cells and connections between them. This effect is particularly evident in those areas of the brain that are related to the acquisition of information. It is also important that caffeine stimulates the neurotransmitters that stimulate the brain, i.e. dopamine and acetylcholine. The first of them is crucial for so-called multitasking. It is basically the ability to move one’s focus smoothly from one topic to another allowing completion of several tasks at the same time. The appropriate level of acetylcholine, on the other hand, determines the speed with which the brain processes the data and links new information with the information that it has previously learned. The combination of caffeine and L-theanine allows the brain to function smoothly and promotes its recovery.