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L-Theanine Supplement

$ 19.95

L-Theanine offers a natural way to promote relaxation and calmness, helping you unwind without feeling drowsy.
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Description

L-Theanine is an amino acid that is not commonly obtained through dietary sources. It is structurally similar to the neurotransmitters GABA and glutamate, and acts in a similar manner in the brain following oral ingestion.

L-Theanine has been found to support feelings of relaxation without causing sedation. It also supports healthy stress levels and attention span. These properties make it ideal for combining with caffeine as a way to attenuate the jitteriness some people experience from it. The combination of L-Theanine and Caffeine, for example, has been shown to support cognitive functions such as memory, focus, energy, and problem-solving ability.


Soy-Free, Gluten-Free, Non-GMO

Benefits
  • ≥98% L-Isomer Purity: The same purity spec used by Suntheanine® and AlphaWave®, verified per-lot on our published Certificate of Analysis.
  • Pharmacologically Equivalent to Branded Forms: Same molecule, same dose, same body of clinical evidence — without the licensing markup.
  • Third-Party Tested for Every Lot: Identity, potency, heavy metals, and microbial contamination tested by an independent lab. COA published on this page.
  • Pairs Well with Magnesium L-Threonate and Apigenin: For nighttime relaxation and sleep support. Pairs with caffeine for daytime calm focus.
  • Manufactured in a cGMP-Compliant Facility: Encapsulated and finished in the United States. Non-GMO, gluten-free, soy-free.

Directions & Dosage

The typically recommended dosage of L-Theanine is 100 – 200 mg, although when combined with Caffeine a dosage of 200 mg is more common. There is evidence that exceeding a dosage of 200 mg has little additional benefit, as when more than 200 mg is taken the excess is used by the body as a raw material for protein production.

While the standard 200 mg dosage can be exceeded without much risk of adverse side effects, it is generally a waste of money and is not recommended.
View Certificate of Analysis View Third Party Test Results

Every batch is manufactured in a cGMP facility and third-party tested for identity, potency, and contaminants including lead, cadmium, arsenic, and mercury.

Identity, potency, and contaminants verified per batch Identity, potency, and contaminants verified per batch
Manufactured in an FDA-registered cGMP facility Manufactured in an FDA-registered cGMP facility
Manufactured in the USA from Gloabally Sourced Materials Manufactured in the USA from Gloabally Sourced Materials

Benefits

  • L-Theanine - Perfect for those that need to remain calm while retaining a sharp mental edge
  • Non-GMO and Gluten Free - Double Wood's L-Theanine is Non-GMO and Gluten Free
  • Works Well with Magtein (Magnesium L-Threonate) and Apigenin - Take with Magnesium L-Threonate and Apigenin for best results
Benefits

L-Theanine

An amino acid naturally occurring in green tea. As a dietary nutrient, it is found in foods and may complement an everyday nutrition routine. It is commonly chosen to supports calm alertness and focus without drowsiness.

L-Theanine

What Customers Are Saying

Reviews

"Reputation of product and overall delivery and ordering experience has always been a good experience."

Jacqueline P.

"Always fast shipping and great selection no matter what you’re looking for."

Aaron B.

"Double Wood is always my go-to for supplements. Great, effective, clean products and always at a reasonable price."

Jan W.

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Reviews
Supplement Facts

Pairs well with

Powerful alone, stronger together. L-Theanine Supplement delivers targeted support on its own, but combining it with complementary ingredients can help create a more holistic and balanced approach to wellness.

  • Magnesium L-Threonate (Magtein) Supplement

    Magnesium L-Threonate enhances brain magnesium levels, promoting cognitive health and helping you stay sharp and focused.

  • Apigenin Supplement

    Apigenin supports overall wellness with its natural antioxidant properties, found abundantly in chamomile tea.

Frequently Asked Questions

When to take L-theanine?

Taking L-Theanine it dependent on your health goals Many people take L-theanine in the morning alongside caffeine to reduce jitters and promote calm focus throughout the day. Others prefer taking it in the evening to encourage relaxation and support better sleep quality.

Does L-theanine make you sleepy?

While L-theanine can promote relaxation and reduce stress, it typically doesn’t make you feel drowsy during the day. Instead, its calming properties may indirectly support better sleep quality by helping you unwind before bed.

Is your L-theanine the same as Suntheanine®?

The active compound is identical. Suntheanine® is a trademarked, patented manufacturing process owned by Taiyo Corporation; the molecule it produces is L-theanine. Our L-theanine is produced by a different manufacturer using a different fermentation process, but the end product is the same molecule at the same ≥98% L-isomer purity. The clinical research on L-theanine applies to both.

Why is your L-theanine less expensive than Suntheanine® products?

Suntheanine® and AlphaWave® are branded ingredients that carry licensing and marketing costs passed along to the finished product. Our L-theanine is a non-branded fermentation product manufactured to the same purity spec. We pass the savings to you without compromising on what's in the capsule.

How do I know I'm getting actual L-theanine and not a substitute?

Every batch we ship is tested by an independent third-party lab for identity (confirming the material is L-theanine), potency (confirming 200 mg per capsule), and contaminants (heavy metals and microbes). The Certificate of Analysis for your specific lot is published on this product page before you buy.

Is Double Wood L-Theanine third-party tested?

Yes. Every batch is third-party tested by an ISO/IEC 17025-accredited laboratory for identity, L-theanine purity, heavy metals, and microbial safety. L-theanine is verified by HPLC against the L-theanine reference standard, confirming the pure L-isomer (the bioactive form used in published clinical research, distinct from the D-isomer or D/L racemic mixtures). The full COA panel also covers four heavy metals via ICP-MS (arsenic, cadmium, lead, mercury against USP <2232> limits) and six microbial screens (Total Plate Count, Yeast & Mold, Coliform, E. coli, Salmonella, Staphylococcus aureus per USP and AOAC methods). Manufactured in a cGMP-certified U.S. facility.

What does the L-Theanine Certificate of Analysis confirm?

The COA verifies 200 mg of L-theanine per capsule by HPLC, with purity confirmed at ?99% — the pharmaceutical-grade standard for L-theanine and the same purity profile published in human clinical research on cognition and sleep. Identity is verified against the L-theanine reference standard, confirming the pure L-enantiomer rather than the racemic D/L mixture. Heavy metals: arsenic, cadmium, lead, and mercury verified below USP <2232> daily-intake limits via ICP-MS. Microbial counts within USP and AOAC specifications. The current batch COA is linked above for verification against the lot number on your bottle.

Overall rating: 4.897959 / 5 from 49 reviews.

AI Generated Review Summary

Summary topics

Review topics: ["results","quality","service","price","sleep","supplement","wood"].

Review highlights

Reviews

Taking L-theanine has been a

"Taking L-theanine has been a wonderful experience for my sleep issues Thanks so much"

— Essau E. (5/5)

Great for enhancing my sleeping habits

"It’s awesome! Help me to fall asleep easier. Much much better than Melatonin."

— Chloe N. (5/5)

This is my go to

"This is my go to for calm energy. In todays world we are stressed more than ever and this takes the edge off stress."

— Barbara W. (5/5)

"Great conpany with great products"

— Alicia (5/5)

"Good quality product. Great price. Hoping it will allow me to de-stress better."

— Kenneth (5/5)

Game changer

"This is by far the best supplement in my regimen. Paired with caffeine, L-Theanine helps calm my anxiety and keep me focused."

— Joshua A. (5/5)

feel the calm

"Double Wood reliably offers quality products and helpful customer service. Very pleased to have found this l-theanine. It is very beneficial, particularly in these stressful times."

— Lise (5/5)

Cheap sleep support!

"Great price and very beneficial for my sleep!"

— Shawn (5/5)

Very relaxed after taking this

"Very relaxed after taking this supplement"

— Shelby M. (5/5)

Behavioral Improvement !

"L- Theanine is proven to help with calming and focus for anxious children, including those on the autism spectrum, and this dose works well for us! DoubleWood always delivers a quality product, good quantity, at a reasonable price."

— Lisa (5/5)

Q&A

I&#x27;m currently mixing your collagen powder with my coffee in the morning. Is it safe to also take the L-Theanine supplement at the same time? In addition, I&#x27;m taking your magnesium glycerate with ashwagandha drops at night before bed.
Thank you for reaching out with your question! For faster assistance with product-related inquiries, we recommend contacting our customer service team directly at hello@doublewoodsupplements.com. Our team will be happy to provide the information or support you need.

L-Theanine Supplement

From

$ 19.95

Primary Benefit

Anxiety & Stress

Other Benefits

Sleep

Product Form

Capsule
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