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L-Theanine - Image 5
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L-Theanine

120 caps

An L Theanine supplement providing 200 mg per serving in a simple formulation.

Free delivery on subscriptions
Free sample each month
Pause or cancel anytime
365 day free returns

In stock. Next day delivery available.
Healf Zone members get free next day delivery on all orders.

Recommended pairing

People complement L-Theanine with magnesium as magnesium supports relaxation and muscle function, enhancing L-Theanine's calming effects for better stress relief and sleep quality.

Key Benefits

  • Provides 200 mg L Theanine per serving.

  • Contains a single amino acid ingredient.

  • Free from soy and gluten.

L Theanine is a naturally occurring amino acid that is structurally similar to certain neurotransmitters found in the body. It is not commonly obtained through everyday dietary sources and is therefore often consumed in supplemental form. This formulation provides 200 mg of L Theanine per serving using a straightforward ingredient profile. It is free from soy and gluten and produced using non GMO ingredients, making it suitable for everyday dietary use.

Double Wood Supplements, founded by twin brothers Reese and Evan Wood in 2013, was created with a focus on transparency, quality, and accessibility. The brand is known for its straightforward, single-ingredient formulations that allow customers to make informed choices about their wellbeing. Each product is third-party tested, with Certificates of Analysis available to ensure safety and integrity. Through its commitment to science and honesty, Double Wood Supplements continues to make high-quality products available to everyone.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step — Brand Discovery, Expert Validation, and Community Testing — here.

L-Theanine, Gelatin (Capsule), Rice Flour, Anti-Caking Agent (Vegetable Stearate), Anti-Caking Agent (Silicon Dioxide)

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.

Additional Information:

Food supplements and foods sold by Healf should not be used as a substitute for a varied, balanced diet and healthy lifestyle.

If you are pregnant, breastfeeding, have a medical condition, or are taking any medications, please consult with a healthcare professional before use. Use products only if the seal is intact. Store in a cool, dry place, out of the reach of young children. Do not exceed the recommended daily intake.

We make every effort to ensure that product information on our website is accurate and up to date, but packaging and ingredients may occasionally vary from images shown on site. Please refer to the product label and contact Healf before use if you have any questions regarding your specific allergies or intolerances.

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Reviews

Paul G.
Verified Buyer
about 2 months ago

Very good product

Very good product

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Frequently asked questions

Every product undergoes our Healf Curation Process. With it, you can shop confidently knowing that every item has been tried and tested before it reaches you. Our Healf Curation Process includes three key steps: Brand Discovery, Expert Validation, and Community Testing. Through these, we assess quality, ingredients, effectiveness, and more, ensuring that every product empowers your wellbeing.

The Healf Source offers detailed insights into different aspects of wellbeing, as well as guidance, research, recipes, and more to help you invest in your personal wellbeing journey. You can also subscribe to our weekly newsletters for the latest updates at Healf and in the wellbeing industry. Subscribe via the sign-up block at the bottom of this page.

We love people who check ingredients as carefully as we do, so you'll find detailed information about the ingredients used on every product page (where applicable). If you see something you'd like to flag with us or have additional questions, please don't hesitate to get in touch—we'd love to hear from you.

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Healf Curation Processâ„¢

Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.

The Discovery

The Discovery

Our approach keeps us at the forefront of wellbeing. With our global network of health professionals and AI-powered trend analysis, we curate the leading supplements, tools, and tech that pioneer the industry.

Expert Validation

Expert Validation

Each product at Healf is carefully examined by a panel of industry specialists—including dieticians, personal trainers, psychologists, and sleep experts—to ensure it meets our high standards for quality, efficacy, and ingredient formulations.

Community Testing

Community Testing

By collaborating with a dedicated group of customers who test and review each product, we ensure that only those truly beneficial to your wellbeing are offered here at Healf.

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Double Wood Supplements L-Theanine | Healf