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L-Theanine - 400 mg capsules

L-Theanine - 400 mg capsules

High-dose L-Theanine · Calmness and focus · Third Party Tested

1 total reviews

Regular price €22,60
Regular price Sale price €22,60
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Health Needs

SleepStress
Size

100% Refunds on All Returns for Any Reason.

Gluten free
Vegan
Sustainable
Proven results
3rd Party Tested
ISO 9001 and GMP
About L-Theanine

L-theanine is a naturally occurring amino acid that can be found in the green tea plant (Camelia sinensis). L-theanine acts as a neuroprotector that can cross the blood-brain barrier and have a direct effect on the brain. It is most known for its relaxing and calming effects, especially in highly stressful situations. For example, four studies using 400 mg of L-theanine found that it significantly reduced stress and anxiety in healthy participants. 250-400 mg of L-theanine also improved focus, sleep, and blood pressure in healthy young adults. L-theanine is recognized as a safe supplement with little to no side effects. It may interact with medication for controlling blood pressure and treating cancer, and it is not suitable for pregnant and breastfeeding women. The usual daily dosage of L-theanine is 200-400 mg, with one tablet usually containing 200 mg.

Benefits of L-Theanine
  • L-Theanine works as a natural calming agent, especially in very stressful situations,
  • L-Theanine reduces anxiety and helps you think clearly,
  • L-Theanine improves focus, sleep, and blood pressure in healthy young adults.
Efficacy Studies
  1. Hidese et al. proved that taking 200 mg of L-theanine for 4 weeks significantly reduced stress and anxiety symptoms and improved cognitive function and verbal fluency. 
  2. Giesbrecht et al. showed that a combination of 97 mg of L-theanine and 40 mg of caffeine reduced tiredness and improved alertness after 20 and 70 min of taking the supplements.  
  3. In a 2012. clinical study, Yoto et al. showed that taking 200 mg of L-theanine for a week significantly reduced blood pressure and stress. 
How to Use

Take with water in the evening or before bed.

Can also be taken during the day for calm focus.

Sustainability

Every decision we make takes the health of our planet into account. At each stage of our operations, we find ways to reduce waste and minimize our carbon footprint.

We source sustainable and environmentally responsible materials and suppliers for our products. Our packaging is 100% biodegradable. And we actively look for ways to improve.

Reuse Tip: Once you’ve taken all your supplements, the tubes can be repurposed to hold paper clips and bobby pins or used in craft projects.

Quality Control

Our supplements are vegan, gluten-free, kosher, and halal. They are produced according to the highest standards in the food supplement industry to ensure you receive the best product possible.

International Organization for Standardization
We meet the highest standards in the food supplement industry: ISO 9001 and ISO 2200 qualifications. Learn More

Good Manufacturing Practice
All products are stored in a facility with low humidity and are refrigerated below 25° C to preserve potency. Learn More

Certified Food and Chemical Analysis
The BAV Institut tests every ingredient we use to confirm purity. Learn More

Third-Party Tested
We send all our supplements to third-party certified laboratories for additional quality control.

Shipping and Returns
  • All orders are shipped priority with tracking and insurance and arrive within 3-4 days depending on your location. Please visit our shipping policy page for more information.
  • If you change your mind or are unsatisfied for any reason, you can return your product for a full refund. We will provide a shipping label and issue your refund within 1-2 weeks. Our full refund policy can be found here.
Product Specifications
  • Capsules: 60 & 180
  • Capsule material: HPMC (vegetable glucose)
  • Contents:  L-Theanine
  • Capsule sizes: 400 mg
  • Container: FSC-certified, responsibly-sourced paper tube
  • Container dimensions:
    60 capsules: 5 cm (diameter), 10 cm (height) 
    180 capsules: 7 cm (diameter), 13 cm (height)
  • Labels: Coated paper (faster biodegrading)
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Real customers

What our customers say

Real reviews from our Google Business Profile and Trustpilot, written by customers across Europe, together with the products they ordered.

  • Maly C. Customer photo

    I am extremely satisfied with their products, especially resveratrol, spermidine, collagen and berberine!! Good prices and very pure and effective products. I feel the difference in my body. Thank you 🙏

  • Silvia Emma A. Customer photo

    Excellent e-commerce site for buying certified natural products. I’ve been using it for a few months and found it reliable, with extremely effective products.

    I’ve used L-Theanine, Ashwagandha, St. John’s Wort and GABA. In my experience, all products are effective and 100% guaranteed.

  • I’ve ordered several times from Augment Life and I can only recommend them. The Magnesium Glycinate is excellent, top quality, and I truly notice the difference in my well-being. On top of that, the customer service is simply phenomenal – fast, attentive, and always available. Without a doubt, one of the best shopping experiences I’ve ever had.

  • Gena C. Customer photo

    I have ordered many times from Augment Life – mainly I get the magnesium, which is a very high quality supplement (all the ones I have tried are amazing) and I feel it a lot better compared to other brands I have tried. 10/10 recommended.

  • Bulgaria

    The best supplements I’ve ever had. 🤩

    These supplements are exceptional. I absolutely love how easy they are to use, the dosage is perfectly designed, and the packaging is incredibly compact, convenient and eco-friendly.

    They are simply amazing – providing a complete range of everything you might need to support a long, healthy life and truly enjoy it to the fullest.

  • Hélène M. Customer photo
    NMNFrance

    I was kept informed about the arrival of my order from the moment it was shipped. The product matched the order, and I received plenty of information about its effectiveness and how to take it.

  • Good morning, I bought NMN 500 mg, CoQ10, hyaluronic acid, quercetin, ashwagandha and magnesium glycinate.

    I’m 45 years old and I used to feel constantly tired, unfocused, and sleep poorly… and I’ve been taking them for only 4 days now! More focus! More mental clarity! More energy!

  • I started taking Augment Life Hyaluronic Acid a little over a month ago, and I can honestly feel the difference. My skin feels more hydrated, smoother, and has a natural glow that wasn’t there before. I also noticed an improvement in joint comfort, especially after long days. The capsules are easy to take, gentle on the stomach, and the quality really stands out compared to other supplements I’ve tried. An amazing product – I truly notice the results and will definitely keep it in my daily routine.

  • NMNBelgium

    A month ago, I started taking Augment Life NMN capsules. Since then, I’ve had much more energy and hardly need any afternoon naps! I’m very satisfied with this supplement and with Augment Life!

  • Excellent experience with Augment Life. Their Magnesium Glycinate has been gentle on my stomach and noticeably helps with evening relaxation and post-workout muscle tension. Customer support replied quickly to a dosage question, and the newsletter is a great read with practical health insights.

    The Hyaluronic Acid supplement fits seamlessly into my routine and my skin feels more hydrated throughout the day. Shipping was quick. Solid products and a reliable team.

  • Excellent products that are already part of my life: magnesium glycinate, ashwagandha and the B Complex – the best without a doubt!

  • NMNPoland

    This is my second time ordering NMN from Augment Life and once again, everything went smoothly. The delivery was really fast, and the packaging was secure and professional. The product itself is top quality. I’ve definitely noticed a boost in my energy levels since I started taking it. It just feels like a clean, reliable supplement. Very happy overall, will keep coming back.

  • Greece

    Augment Life have an excellent range of top quality supplements. Full details are given about every product. Every product is tested to a high standard, giving assurance that the products are clean and effective.

  • Excellent experience with their Urolithin A product. A pretty cutting-edge supplement that I am extremely happy to be able to buy from a European company. Seamless purchase and quick delivery. Fantastic quality overall.

  • The product just arrived and everything is great. I’m really looking forward to starting the coenzyme Q10.

  • Bulgaria

    Arrived neatly packaged with separately packed measuring scoops, without the need to dig into the package for it. Overall great experience!

  • Cyprus

    Great supplements available, great support as to how to take supplements and when. Fast delivery and great packaging.

  • Michalis B. Customer photo

    I bought Magnesium Glycinate, Berberine, Creatine, Curcumin and NR. I was very pleased with the texture of the products initially. Compared with similar products I have bought, the results were very different. Amazing products.

  • Malta

    Prompt delivery. Cannot wait to try out these high quality products and experience the benefits! Excellent comprehensive product range.

  • Delivery was fast.
    Very happy with the magnesium glycinate and creatine.
    I’ll keep buying from you.

  • Greece

    Excellent quality and performance formulations with fast and quality service and shipping.

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Understand L-Theanine

  • How to take L-theanine?

    How to take L-theanine?

    L-theanine is a natural amino acid, found in green tea plants (lat. Camelia sinensis). It works as an antioxidant and neuroprotectant, that helps you to relax, sleep better, and be more focused and concentrated.  But how...

    How to take L-theanine?

    L-theanine is a natural amino acid, found in green tea plants (lat. Camelia sinensis). It works as an antioxidant and neuroprotectant, that helps you to relax, sleep better, and be more focused and concentrated.  But how...

  • Why should you take L-theanine?

    Why should you take L-theanine?

    L-theanine is a special amino acid that you can find in tea leaves (of the Camellia sinensis plant). Scientific studies have shown that supplementation with L-theanine helps you sleep better, be less anxious, relax,...

    Why should you take L-theanine?

    L-theanine is a special amino acid that you can find in tea leaves (of the Camellia sinensis plant). Scientific studies have shown that supplementation with L-theanine helps you sleep better, be less anxious, relax,...

  • How Much L-Theanine Should You Take?

    How Much L-Theanine Should You Take?

    L-theanine, a naturally-occurring amino acid, has been known to be a star in the world of wellness that’s primarily found in green tea and some mushrooms. It is known as...

    How Much L-Theanine Should You Take?

    L-theanine, a naturally-occurring amino acid, has been known to be a star in the world of wellness that’s primarily found in green tea and some mushrooms. It is known as...