L-Theanine 400

L-theanine in a high-dose form

Healthwell L-Theanine 400 is a high-dose supplement with as much as 400 mg of theanine per dose. The amino acid occurs naturally in the leaves of the tea bush and has been studied in connection with the release of the neurotransmitters dopamine and serotonin. The supplement is easy to dose and is taken before bedtime for the best effect. Healthwell L-Theanine is our most high-dose theanine supplement and is suitable for those who want a higher dose.

• Our most highly-dosed supplement of L-theanine
• 400 mg of theanine per capsule
• Found naturally in the leaves of the tea bush
• Taken before bedtime
• Vegan with plant-based capsules

What is L-theanine?

L-theanine (gamma-glutamylethylamide) is a non-protein-forming amino acid that occurs naturally in the leaves of the tea bush. One cup of tea usually contains 25-60 mg of theanine. Although theanine does not form proteins, the amino acid has other functions in the body. It is popular to take in connection with sleep or to get a calming feeling. Theanine most often occurs as so-called L-isomers, and is therefore often described as L-theanine.

What does L-theanine do in the body?

L-theanine is often noted in connection with the release of the neurotransmitters serotonin and dopamine in the brain, the so-called "feel good" hormones. Higher levels of serotonin make us calmer, and dopamine in turn affects the brain's reward system. Studies suggest that L-theanine may be beneficial in dealing with stress-related disorders (1). The amino acid has also been noted in connection with improved sleep quality (2). To get the best effect, you should take L-theanine just before you go to bed. However, more studies are needed to be able to say anything for certain, and it’s best to try it yourself.

L-theanine in different doses

Healthwell L-Theanine 400 is a high-dose supplement with as much as 400 mg of theanine per dose. It is a perfect supplement for those who want a higher dose of L-theanine per day. For those looking for a more high-dose supplement, there is Healthwell L-Theanine 200 and Healthwell L-Theanine 100.

There is no evidence that a higher dose of L-theanine would be harmful. No adverse effects of the substance have been identified. We recommend following the dosage recommendation on the package (1 capsule daily before bedtime or as prescribed) to be sure to avoid any side effects.

References

1. Hidese Shinsuke, Ogawa, Shintaro et al. 2019. Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial.
2. Rao, Theertham, Ozeki, Motoko et al. 2015. In Search of a Safe Natural Sleep Aid.

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