Cognition & Focus · Sleep · Stress & Calm

L-Theanine Calm – 120 servings

Name: L-Theanine Calm
Rating: 4.8 (12 reviews)

✓90-DAY MONEY-BACK GUARANTEE

$48.00$0.40 PER SERVING

L-theanine is an amino acid found almost exclusively in the tea plant, and it is why a cup of green tea steadies you in a way coffee does not. A full 200 mg per capsule, the amount used across the research, drawn from the leaf rather than made in a lab. One hundred and twenty capsules.*

Supports relaxed alertness

Calm without a trade-off in focus

Supports normal neurotransmitter activity

Supports a steadier stress response

Supports an easier wind-down

The amount the research used

THIRD-PARTY TESTEDcGMP FACILITYVEGAN CAPSULENON-GMOCOA PER LOTGLUTEN-FREE

How to take

Take 1 capsule daily, with or without food. Morning alongside coffee, mid-afternoon, or as part of an evening wind-down. Timing is flexible.. Consistency matters more than timing — pick a moment you'll remember daily.

Keep out of reach of children. Consult a qualified healthcare professional before use if you are pregnant, nursing, taking medication, have a medical condition, or are planning a medical procedure. Do not use if the safety seal is damaged or missing.

Quality & testing

Manufactured in the USA in a cGMP-certified facility. Raw materials are tested and qualified before use, and every finished batch is verified by an independent lab for identity, potency, heavy metals, and microbials. Results publish on this page per lot.

Shipping & subscription

Subscribe at any frequency — every month, every 2 months or every 3 months — and save 10%. Subscribe to a second product and every subscription goes to 20%. Free shipping on subscriptions, and you can pause, skip or cancel anytime from your account — no phone calls, no hoops.

What it supports

Supports relaxed alertness

L-theanine is associated with alpha brain-wave activity, the pattern linked with feeling settled while staying sharp.

Calm without a trade-off in focus

Unlike a sedative, it supports a settled state while alertness and concentration stay intact.

Supports normal neurotransmitter activity

It crosses the blood-brain barrier and is involved in the GABA, dopamine and serotonin pathways behind calm and attention.

Supports a steadier stress response

Studied for its role in how the body responds to everyday stress.

Supports an easier wind-down

Taken in the evening, 200 mg has been studied as part of a wind-down routine without acting as a sedative.

The amount the research used

A full 200 mg per capsule, drawn from the tea leaf, with the exact amount printed on the label.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Drawn from the leaf. Dosed to the research.

L-theanine — drawn from the tea leaf

	L-Theanine 200 mg	Synthesised L-theanine	Calm blends
Drawn from the tea leaf	●	—	Varies
A full 200 mg per capsule	●	Varies	—
Exact amount on the label	●	●	—
Caffeine-free	●	●	Varies
No proprietary blend	●	●	—
COA published every lot	●	—	—

GENERAL FORM COMPARISON — INDIVIDUAL PRODUCTS VARY BY BRAND

What's happening
while you wait.

*INDIVIDUAL RESULTS VARY. THESE STATEMENTS HAVE NOT BEEN EVALUATED BY THE FDA.

Inside the formula

L-theanine — drawn from the tea leaf

L-theanine is a non-proteinogenic amino acid found almost exclusively in the tea plant. It crosses the blood-brain barrier and is associated with alpha brain-wave activity — the pattern linked with relaxed alertness rather than drowsiness, which is what separates it from a sedative. Two hundred milligrams is the amount used across most of the research, and reaching it from tea alone would take around eight cups. Ours is drawn from the leaf rather than synthesised, and that is most of what you are paying for.

CUSTOMER REVIEWS

4.8 /5 ★

Based on 12 reviews

100%

Would recommend this supplement

Customers say

✦ Summarised from customer reviews.

The most repeated theme is calm without drowsiness — reviewers describe feeling less scattered, less reactive or less tense while still being able to work, study or drive. Several specifically pair it with coffee and report fewer jitters. Evening use comes up almost as often, with reviewers noting it quiets the mind without acting like a sleeping pill and does not leave them groggy. Nearly everyone describes the effect as gentle or subtle rather than dramatic, and a few say it took a couple of weeks before they noticed anything. One reviewer mentions preferring that it is naturally derived from tea leaves.

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Frequently asked
questions

How do I know what's on the label is in the bottle?

Trust should be verifiable. Every batch we produce is tested by an independent laboratory, and the certificate of analysis for your exact lot is published on this page — potency, heavy metals, microbials. Testing begins the moment a raw material arrives, continues through production, and no batch is released until every result clears. The label is a claim. The COA is the proof.

How do you choose your ingredients and doses?

We formulate from peer-reviewed clinical research and dose to match it. We select the highest-grade material available for each ingredient, in the form the body absorbs best, and where a patented or branded form is the one that has actually been studied, that is the one we use. Every active appears at its exact amount, with no proprietary blends and nothing added that doesn't need to be there.

Where are CoreLabs supplements made?

In our own cGMP-certified facility in California's Central Valley. Manufacturing in-house means quality is our responsibility at every step rather than a supplier's promise. Raw materials are purchased through established US suppliers who import and qualify them, and every material is tested against our own specification before it enters production — wherever it originated.

Why are CoreLabs supplements more expensive?

Because of what goes in. We buy the highest grade of each raw material, in the most absorbable form, and we work with the branded and patented ingredient houses whose material the clinical research was actually run on — names like Lonza, Albion, RIBUS, Sabinsa and Indena. Wherever possible those materials are made domestically. Our capsules are titanium-dioxide free. Then it is made in our own facility and third-party tested batch by batch. Every one of those choices costs more than the alternative, and the price reflects it. Anyone can claim quality — we publish ours.

Will it make me drowsy?

It is associated with relaxed alertness rather than sedation — alertness and concentration stay intact, which is why many people take it during a workday rather than at the end of one.

Why 200 mg?

It is the amount used across most of the focus, stress and sleep research. Reaching it through tea alone would take around eight cups.

Why does it cost more?

There is only so much theanine in a tea leaf, and drawing it out is slow, low-yield work. That is what you are paying for. It comes to around 40 cents a day, and a bottle lasts four months.

Can I take it with coffee?

Yes, and deliberately so. Theanine alongside caffeine is the most-studied pairing in the focus literature.

When should I take it?

One capsule daily, with or without food. Morning, afternoon or evening — timing is flexible.

How long does a bottle last?

One hundred and twenty capsules at one a day is four months.