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L-theanine

510 reviews
  • 98% pure L-theanine from green tea
  • 100% natural, vegan & non-GMO
  • Small, easy-to-swallow capsules

L-theanine derived from the leaves of green tea, with a purity of 98%. Pure, plant-based and without synthetic additives.

  • Lab-tested in Europe
  • 30-day money-back guarantee*

60 servings · 200mg

Nutrition label

Nutrition values

Per capsule, as the label states it.
Nutrition values: Per capsule
L-theanine (98%)100 mg
of which caffeine≤0.2 mg

Ingredients: L-theanine from green tea (Camellia sinensis), plant-based capsule.

1

Clearly L-theanine is 98% pure L-theanine from green tea leaves (Camellia sinensis), in a small plant-based capsule. 100 mg per capsule, 60 capsules per pouch.

What's in a capsule

102 mg of 98% L-theanine, which gives 100 mg L-theanine per capsule and 200 mg per serving of two. The purity is measured by HPLC. Because it is extracted from green tea, a trace of caffeine remains: no more than 0.2%, around 0.2 mg per capsule. A cup of tea holds 20 to 50 mg.

Where it comes from

L-theanine is an amino acid that occurs almost only in the tea plant. It is one of the compounds that give tea its soft umami taste. Ours is extracted from green tea leaves and concentrated, not made synthetically.

What else is in it

Nothing. No synthetic additives, no fillers. Vegan, non-GMO, non-irradiated, and tested for heavy metals, pesticides and microbiological purity. Certified halal and kosher.

How to take it

1 to 2 capsules a day with a glass of water, with or without a meal: L-theanine is water-soluble.

One ingredient: 100 mg L-theanine (98% pure, from green tea) per capsule, in a plant-based capsule. Nothing else: no fillers, colours or artificial additives. Every batch is lab-tested in Europe. Formulated and produced in the Netherlands.

  • L-theanine200 mg98% pure, from green tea

Clean formulation

  • 98% pure, from green tea
  • Vegan and non-GMO
  • No fillers
  • Halal and kosher certified
  • Lab-tested in Europe
  • Produced in the Netherlands

Take 1 to 2 capsules a day with a glass of water, with or without a meal. One pouch holds 60 capsules. Do not exceed the recommended daily dosage; a food supplement is no substitute for a varied, balanced diet.

  • Take 1-2 capsules a day
  • With a glass of water
  • With or without a meal

No health claim about L-theanine is approved in Europe, and none that applies to it is awaiting approval, so this page makes none.

The claims that were submitted about L-theanine were assessed by the European Food Safety Authority and not approved.

What we do say is what is in it: the ingredients and their amounts are under Nutrition & ingredients, the label under Product details.

All claims per ingredient, with their sources

Nutrition values

Per capsule, as the label states it.
Nutrition values: Per capsule
L-theanine (98%)100 mg
of which caffeine≤0.2 mg
Ingredients
L-theanine from green tea (Camellia sinensis), plant-based capsule.
Serving size
1 to 2 capsules
Servings per pack
30 to 60 (60 capsules)
Caffeine
No more than 0.2% (about 0.2 mg per capsule)
How to use
1 to 2 capsules a day, with a glass of water, with or without a meal.
Advice
Do not exceed the recommended daily dosage. A food supplement is no substitute for a varied, balanced diet and a healthy lifestyle. Consult a doctor if medicating, managing health issues, or if pregnant.
Storage
Keep cool (15 to 25 °C), dry, closed and out of sunlight. Keep out of reach of children. Batch code and best before: see the bottom of the pouch.
Origin
Formulated and produced in the Netherlands.
Clearly L-theanine supplement capsules for relaxation and focus, shown in a close-up image.

98% pure L-theanine from green tea.

L-theanine derived from the leaves of green tea, with a purity of 98%. Pure, plant-based and without synthetic additives.

30-60 servings · 60 capsules

  • 200 mg
  • 98%
  • 0.2%
  • 60
  • 1-2
  • 100%
  • From green tea

    Naturally derived from the leaves of Camellia sinensis.

  • 98% purity

    A high, consistent concentration of L-theanine.

  • Virtually caffeine-free

    Less than 0.2% caffeine.

What’s in two capsules

L-theanine in a plant-based capsule. Lab-tested in Europe.

  • 200 mg L-theanine
  • 98% purity
  • 1-2 capsules a day

The L-theanine

200 mg · 100 %

  • L-theanine
  • L-theanineActive compound98% pure, from green tea200 mg

    L-theanine is an amino acid that naturally occurs almost exclusively in the leaves of the tea plant (Camellia sinensis). Ours is naturally derived from green tea and concentrated to 98% purity, without synthetic additives. Plant-based, virtually caffeine-free and certified halal and kosher.

Amounts per serving (2 capsules), as on the label: 204 mg of 98% L-theanine, which gives 200 mg L-theanine. One capsule gives 100 mg. The label gives no amount for the capsule.

Nutrition label

Nutrition values

Per capsule, as the label states it.
Nutrition values: Per capsule
L-theanine (98%)100 mg
of which caffeine≤0.2 mg

Ingredients: L-theanine from green tea (Camellia sinensis), plant-based capsule.

How to take it

One or two capsules a day, with water

Take 1-2 capsules a day

With a glass of water

With or without a meal

Your questions, answered clearly

No fluff, just the facts.

Any other question? Chat with us

Our L-theanine is naturally derived from the leaves of green tea (Camellia sinensis). It isn't a synthetically produced substance, but comes from the same plant as tea.

Our L-theanine has a purity of 98%, measured by HPLC. That's a high, consistent concentration: each capsule contains 100mg of L-theanine. The extract is also non-GMO, non-irradiated and tested for heavy metals, pesticides and microbiological purity.

Only a very small amount: no more than 0.2%. Because the L-theanine is naturally extracted from green tea, a minimal trace of caffeine remains, around 0.2mg per capsule. That's far less than a cup of tea, which typically contains 20–50mg.

Final production always takes place in the Netherlands, so we stay in full control of quality and safety. We source our ingredients directly from the origin, always from specialists who are best at what they do.

For every ingredient, there’s someone in the world who does it better than anyone else, and that’s who we work with. No middlemen. Only trusted suppliers who meet the strictest European standards.

At Clearly, our mission is simple: to keep searching for the #1, and make it available to you.

Because it’s clearly the inside that counts.

No flashy design or misleading labels, just a transparent pouch, so you can see exactly what’s inside. Too often, we buy things because they look or sound good… but inside? Sugar, fillers, or low-quality ingredients.

At Clearly, we do it Clearly: only #1 ingredients you can trust, and a fully transparent formula.

We use mono-material, one single type of plastic, which makes the pouch 100% recyclable. Unlike most packaging that mixes paper and plastic and can’t be properly recycled.

When it comes to health, the inside matters most. That’s Clearly.

Yes. Every ingredient is lab-tested for heavy metals, microbiology, and other potential contaminants.

We only use clean, traceable raw materials from trusted suppliers who meet the highest European safety standards.

If it’s not safe, tested, and the best, it’s not Clearly. We don’t go for "good enough", we go for #1 quality.

We use our own products daily. And just like you, we only want the best. Because if your health is #1, what you take should be too.

If you’re pregnant or breastfeeding, we recommend checking with your doctor before taking any supplement. During this time, both your health and your baby’s health are clearly #1.

Customer reviews

5,0
Based on 10 reviews
Gaja

There are many great effects of l-theanine and I am happy to add it to my daily routine. Definitely recommend to give it a try.

Customer photo review of L-theanine
Eddy S.Verified buyer

Ik ben er rustig,helder en ontspannen van.gebruik het meestal als ik thuis ben,lekker chill 😎

Joyce A.Verified buyer

Ik was eerst sceptisch of het echt zou doen wat ze beloven. Na veel inlezen en vergelijken toch de l-theanine gekocht en aan mijn tiener dochter gegeven onder het mom van ‘baat het niet, schaadt het niet’ Toen zij in de trein naar haar school zat appte ze me en vertelde ze dat ze voor het eerst sinds tijden gewoon voor zich uit heeft gekeken zonder dat ze perse over vanalles na hoeft te denken! Haar hoofd was kalmer en overzichtelijker. Dit gaf haar zoveel rust!!!! Ze neemt het nu elke ochtend en avond in. Dus ja; het doet echt wat ze beloven!

Sebastiaan H.Verified buyer

L theanine van Clearly geeft mij een heldere rust op stressmomenten. Zeker een aanrader! Vooral voor ex rokers.

Inge M.Verified buyer

Love the product and also the size of these capsules. It's very easy to swallow, and I find them quite effective with reducing anxiety, stress, racing thoughts, or general calmness.

Ingrida B.Verified buyer

What I love about Clearly products is that they don't contain a bunch of fillers. I chose this one because its clean and pure. Love it and take it daily before bed.