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L-teanina para la hiperactividad y el déficit de atención: qué es y qué dicen los estudios

L-Theanine for Hyperactivity and Attention Deficit: What it is and What the Studies Say

L-theanine is a natural compound that has attracted attention for its potential effects on the mind, concentration, and emotional balance. It is found mainly in green tea, and more and more people are wondering if it can be useful for hyperactivity and attention deficit, especially in cases related to ADHD.

Although it is not a miracle treatment or a substitute for medical care, there are studies that have analyzed its role in attention, impulsivity, stress, and sleep quality. All of this has made theanine a topic of interest for both families and adults looking for complementary support. At Teresa Pons, we have developed liquid theanine to make it easier for both children and adults to take.

What is L-theanine?

L-theanine is a natural amino acid found primarily in tea leaves, especially green tea. Unlike other stimulating compounds, theanine does not usually cause agitation or nervousness. In fact, it is studied for its ability to promote a state of mental calm without sedation.

This is a key point. Many people seek to improve concentration but without feeling overstimulated. This is where theanine becomes interesting: it can help maintain a more serene and focused mind at the same time.

How theanine acts in the brain

One of the most studied aspects of L-theanine is its effect on brain activity. It has been observed that it can influence substances related to mood, attention, and stress response, such as dopamine, serotonin, and GABA.

It has also been linked to an increase in alpha waves, which are usually associated with a state of relaxed alertness. That is, a feeling of tranquility, but without drowsiness.

Therefore, when talking about theanine for attention deficit or hyperactivity, the interest is not in "turning off" the person, but in helping to better regulate their mental activation.

L-theanine and hyperactivity: why it generates interest

Hyperactivity does not always manifest only as physical movement. In many cases, it also appears as mental restlessness, impulsivity, difficulty stopping, and problems sustaining attention. In this context, L-theanine is being studied as a possible support to promote greater stability.

Some of the reasons why its relationship with hyperactivity is being investigated are:

It can promote a state of calm without a sedative effect.
It could help reduce mental overload.
It can contribute to improving the quality of rest.
In some cases, it has been associated with improved sustained attention.

All of this makes many people interested in L-theanine for ADHD or as a supplement for people with symptoms of attention deficit and hyperactivity.

What studies say about L-theanine and ADHD

Scientific evidence is still limited, but there are already some studies that help us better understand the potential of theanine.

A study published in 2011 analyzed the use of L-theanine in children with ADHD and found improvements in sleep quality. This is relevant because poor sleep can worsen inattention, irritability, and hyperactivity during the day.

Other studies have observed that theanine can promote relaxation without harming mental performance. Its combination with caffeine has also been investigated, as together they could improve certain aspects of attention and cognitive control. However, in these cases, it is not always easy to separate what part of the effect corresponds to theanine and what to caffeine.

Overall, the studies do not allow us to state that L-theanine cures ADHD or that it is a first-line treatment. What they do suggest is that it could play a role as complementary support, especially in people with restlessness, associated stress, or sleep problems.

It can help with attention deficit

When we talk about attention deficit, we often think only of difficulty concentrating. But in reality, other factors also influence it, such as anxiety, fatigue, poor sleep, or mental saturation.

In this sense, theanine could provide indirect benefits. If a person is calmer, sleeps better, or has less mental tension, it is possible that it will be easier for them to maintain attention on specific tasks.

This nuance is important. Theanine for attention does not seem to act as a strong stimulant, but as a gentle regulator of the mental state. That is why some people value it more for its balancing effect than for a sudden improvement in focus.

Advantages of L-theanine over other compounds

One of the reasons L-theanine has gained popularity is its gentle profile. Compared to other compounds that can increase nervousness or cause ups and downs, theanine is usually associated with a more stable feeling.

Its possible advantages include:

It does not usually generate the intense activation of other stimulants.
It can promote concentration from a state of calm.
It is well tolerated by many people.
It can be interesting when there is associated stress or irritability.

This does not mean that it is better than a medical treatment or that it works the same for everyone. It simply means that it is a compound with a different profile and that is why it continues to be studied.

In addition, when it comes to children, adolescents, or people who are already taking medication, any supplement should be evaluated with a healthcare professional.

Conclusion

The relationship between L-theanine, ADHD, hyperactivity, and attention deficit remains an open field of research. The available studies point to a promising effect, especially in stress regulation, sleep quality, and sustained attention in some contexts.

However, the evidence is still limited and does not allow it to be presented as a substitute for medical treatment. Viewed with balance, theanine can be considered a complementary tool with potential, especially when seeking to improve concentration from a state of greater calm.

References and cited studies

1. Lyon MR, Kapoor MP, Juneja LR.
The effects of L-theanine (Suntheanine®) on objective sleep quality in boys with attention-deficit/hyperactivity disorder (ADHD): a randomized, double-blind, placebo-controlled clinical trial.
Alternative Medicine Review. 2011;16(4):348-354.
This study observed that 400 mg daily of L-theanine improved some objective sleep quality parameters in children with ADHD.
2. Kahathuduwa CN, Dassanayake TL, Amarakoon AMT, Weerasinghe VS.
Acute effects of theanine, caffeine and theanine-caffeine combination on attention.
Nutritional Neuroscience. 2017;20(6):369-377.
Analyzed the acute effects of theanine, alone and combined with caffeine, on cognitive and neurophysiological measures of attention in healthy adults.
3. Owen GN, Parnell H, De Bruin EA, Rycroft JA.
The combined effects of L-theanine and caffeine on cognitive performance and mood.
Nutritional Neuroscience. 2008;11(4):193-198.
Found that the combination of L-theanine and caffeine improved performance in attention tasks and reduced susceptibility to distractions in healthy adults.
4. Giesbrecht T, Rycroft JA, Rowson MJ, De Bruin EA.
The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness.
Nutritional Neuroscience. 2010;13(6):283-290.
This work showed improvements in attention and subjective alertness with the combination of L-theanine and caffeine.
5. Nobre AC, Rao A, Owen GN.
L-theanine, a natural constituent in tea, and its effect on mental state.
Asia Pacific Journal of Clinical Nutrition. 2008;17 Suppl 1:167-168.
Described that L-theanine increases alpha wave activity, associated with a state of relaxation without drowsiness.
6. Nathan PJ, Lu K, Gray M, Oliver C.
The neuropharmacology of L-theanine (N-ethyl-L-glutamine): a possible neuroprotective and cognitive enhancing agent.
Journal of Herbal Pharmacotherapy. 2006;6(2):21-30.
Review of the possible neurochemical mechanisms of L-theanine, including its relationship with dopamine, serotonin, GABA, and glutamatergic receptors