Sleep Supplements
Amino Acids



Theanine is an amino acid found naturally in green tea leaves and is available as a dietary supplement, making it easy to access its many benefits. Theanine has been shown to promote relaxation and improve sleep quality. It may also help reduce anxiety and improve cognitive performance. Theanine is thought to work by increasing levels of certain neurotransmitters in the brain, including gamma-aminobutyric acid (GABA) and serotonin. These neurotransmitters are involved in regulating mood and anxiety.




Green Tea


Amino Acids

Age range:

18-60, >60


May be toxic in high doses

What influence sleep problems

What are Theanine benefits?

Theanine can help promote sleep through its ability to decrease brain activity. It can also increase levels of GABA, a neurotransmitter that helps induce sleep. In addition, theanine may reduce the production of cortisol, a hormone that can cause stress and interferes with sleep quality. This supplement can also help increase concentration and alertness. It can improve cognitive function and increase energy levels. Theanine may also help reduce anxiety and stress.

Table of relations

Dietary supplementConsistent EffectsStrength of EffectsScientific articles
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Theanine and Sleep

Sleep is a very important physiological process, as it regulates the body's functions. It is responsible for promoting / facilitating energy conservation, synthesis and secretion of hormones and proteins, learning and memory through brain changes. Sleep is mainly driven by the circadian cycle, which involves exposure to light, hormones such as melatonin, and hypothalamic activity. The compounds that help regulate sleep work in different pathways, they can facilitate the process of falling asleep, increase the duration of continuous sleep or improve the quality of sleep.

Theanine and Sleep Latency

Sleep latency is the time it takes between being awake and actually falling asleep. More importantly than many think, sleep latency is linked to and impacted by the stages of sleep. Fortunately there are natural solutions to improve latency and quality of nightly rest.

Theanine and Early Awaking

Early awakening is a form of recurrent sleep disorder and can cause exhaustion. This problem is commonly associated with anxiety and can impair performance the next day, especially in tasks that require focus and attention such as work and physical activities.

Theanine and Stress

Stress can be understood as a situation in which the individual is physically or mentally overloaded, which can cause pain, tension and physical injury, as well as emotional fatigue, tiredness, reduced productivity and attention. The substances that help control stress act on hormonal regulation (for example, cortisol), on the circadian cycle and promote physical and mental relaxation.

Theanine and Anxiety

Anxiety is the body's natural response to stress. It's a feeling of fear or apprehension about what's to come. It can be triggered by a specific situation and not last long - which is very common and ok - or it can be a generalized disorder (which is considered a illness) that can bring harm to everyday life and also cause other conditions like depression.

Other Amino Acids

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