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L-Theanine Health Benefits, Usage, and Side Effects All Backed by Science

L-Theanine Health Benefits, Usage, and Side Effects All Backed by Science

What are the Potential Health Benefits of L-Theanine?

  • Stress and anxiety relief
  • Increases attention and focus
  • Improves immunity
  • Enhances sleep quality
  • Minimises schizophrenia attacks
  • Protects against heart disease
  • Potential cancer treatment

The amino acid L-theanine is usually found in tea leaves. It is known to promote relaxation. For this reason, many people supplement with it to be able to unwind.

To help you decide whether to take L-theanine or not, learn more about some of its benefits.

The main health benefit of L-theanine is stress and anxiety relief. According to research, drinking tea is helpful in times of too much anxiety. (1)

One study found out that it could improve relaxation minus the drowsiness. It could also decrease the resting heart rate. (1)

Another research included 5 randomised-controlled trials. The result showed that L-theanine decreased anxiety and stress in participants. (1)

Also, L-theanine, when combined with caffeine, could help increase attention and focus.

A study in 2013 showed that a moderate amount of caffeine and L-theanine helped young adults focus more while doing demanding tasks. (1)

The respondents in the study felt less tired and more alert. This was supported by another study. According to it, these effects can be experienced as early as within 30 minutes. (1)

If you want better immunity, L-theanine can help you too. Based on some research, this amino acid may boost the immune system.

A study supporting this claim was published in Beverages. It revealed that L-theanine may aid in reducing the risk of upper respiratory tract infections. (1)

L-theanine can improve sleep quality as well.

Research supported that it may be helpful in getting good sleep. One study discovered that 250-400 mg doses of L-theanine could improve human and animal sleep. (1)

This amino acid may improve sleep in boys with attention deficit hyperactivity disorder (ADHD) too.

In 2011, a study observed L-theanine’s effect on 98 boys aging 8-12. One group received two 100 mg L-theanine chewable tablets twice a day. Meanwhile, the other group was given placebo pills. After 6 weeks, those who were given L-theanine experienced longer and better sleep. (1)

This amino acid can help people diagnosed with schizophrenia too.

Research revealed that L-theanine could enhance sleep quality for schizophrenic patients. (1)

Furthermore, it may help by increasing neurotransmitter production in the brain. This results in more controlled symptoms.

There were studies suggesting that L-theanine can protect brain cells from harmful damage. It may decrease the neural pathways’ toxicity levels too. (1)

Supplementing with L-theanine may help you avoid heart disease risks too. It may protect you from coronary heart disease and even strokes. (1)

This is because the amino acid may be effective in reducing blood pressure. It can keep your cardiovascular activities under control too.

What is more, L-theanine in tea may help prevent cancer.

There are studies suggesting that those who drink tea regularly have a lower risk of getting cancer. (1, 2)

Biotechnology researchers also study about L-theanine’s capacity to increase chemotherapy’s effectiveness.

A study in 2011 focused on Bay Bolete mushroom’s L-theanine content. It suggested that the amino acid could improve the efficacy of some chemotherapy medications. (1)

A lot of people claimed that L-theanine supplementation has done them good. However, before you decide to supplement with it, you need to consult a healthcare expert first. More studies must prove its safety as well.

What is L-Theanine?

L-theanine is known as an amino acid analog to glutamine and glutamate. It was discovered in the middle of the 20th century.

This amino acid is usually found in fungal and plant sources. It is popularly found in the tea plant, Camellia sinensis. Also, there are mushrooms, like Bay Bolete, containing L-theanine.

How Does L-Theanine Work?

The chemical structure of L-theanine is similar to glutamate. It is an amino acid that naturally occurs in the body. It aids in transmitting nerve impulses in the brain.

It is not surprising that L-theanine’s effects seem to be the same as glutamate. However, some of these effects appear to block glutamate.

How Do I Take L-Theanine?

The easiest and most popular way of consuming L-theanine is by drinking tea. Moreover, you can find L-theanine dietary supplement products.

As of now, there is no officially recommended dosage for L-theanine. More studies must be done to come up with proper dosages.

Whenever taking any supplement, make sure to only purchase from a reliable brand. Also, see to it that you follow the dosage instruction on the product’s label carefully.

You can also directly ask your doctor about supplementing with L-theanine. This way, you will be guided.

Can I Take L-Theanine Along with Vitamins and Medicines?

L-theanine may interact with other supplements and drugs. This is another reason why you need professional guidance.

Be cautious when combining L-theanine with antihypertensive drugs. This amino acid is known to lower blood pressure. When taken with drugs for high blood pressure, the result might be too low blood pressure.

There are various antihypertensive drugs available. Some are Amlodipine (Norvasc), captopril (Capoten), losartan (Cozaar), furosemide (Lasix), and others.

It is also not advisable to take L-theanine with stimulant drugs. They include epinephrine, diethylpropion (Tenuate), pseudoephedrine (Sudafed), and phentermine (Ionamin).

Stimulant medications work by stimulating the nervous system. On the other hand, L-theanine slows it down. Thus, when taken with L-theanine, stimulant medicines might have reduced effectiveness.

In case you are taking some medications, ask for your doctor’s advice. You need that before supplementing with L-theanine to ensure safety.

Is L-Theanine Safe?

While L-theanine may have various benefits, it may also cause several side effects. Some of them include diarrhoea, dizziness, headaches, and pregnancy complications. These side effects commonly occur to those who consume supplements excessively.

Furthermore, L-theanine can complement the effects of caffeine on humans. Therefore, taking too much of the amino acid can affect the nervous system negatively. It could disrupt hormone production and release.

For this reason, nursing and pregnant women are advised to avoid consumption.

How Will L-Theanine Benefit Me?

Without a doubt, L-theanine can benefit your body and mind. It can help you maintain mental health. Also, it is good for the heart.

We have products containing L-theanine. In case you want to check them out, talk to us now.

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