🧘♂️ Elevate your mind and calm your day — the smart supplement for modern pros!
Nutricost L-Theanine delivers a potent 200mg dose per capsule of this natural amino acid, clinically shown to enhance focus, reduce stress, and improve sleep quality. Manufactured in GMP and FDA-compliant facilities, this non-GMO, gluten-free supplement is third-party tested for purity and safety. With 120 capsules per bottle, it’s designed for daily use by adults seeking a clean, effective cognitive and relaxation boost.








| ASIN | B01B3RWQNM |
| ASIN | B01B3RWQNM |
| Age Range Description | Adult |
| Best Sellers Rank | 1,409 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 337 in Vitamins, Minerals & Supplements |
| Brand | Nutricost |
| Country of origin | USA |
| Country of origin | USA |
| Customer Reviews | 4.5 4.5 out of 5 stars (8,448) |
| Customer reviews | 4.5 4.5 out of 5 stars (8,448) |
| Date First Available | 1 July 2016 |
| Format | Capsule |
| Is discontinued by manufacturer | No |
| Item model number | No Model |
| Manufacturer | Nutricost |
| Manufacturer contact | Imported Brands International Ltd., 124 City Road, London, EC1V 2NX, UK |
| Product Dimensions | 6.2 x 4.7 x 11.2 cm; 62.37 g |
| Serving Recommendation | 1 capsule |
| Units | 120 count |
M**E
Convinced numerous friends and family to take - all say they work
Been taking these for about 9 months and one of the few supplements are I've continually taken - used on recent biking trip to the alps and really helped with focus on long days, very effective and compared to caffeine drinks much better and no tail off
L**U
Very helpful
Extremely helpful during high stress period. Calming and easy to tolerate.
Z**A
YES.
Yes. It works. Calms the anxiety noise for my morning writing routine. My partner likes it, too. Not bad for a household of academics with ADHD.
J**J
Okay good for anxiety
This L-Theanine works pretty well for calming me down and easing anxiety. I don’t notice a big difference beyond that, but it definitely helps me feel more relaxed. Easy to take and seems like good quality overall but EXPENSIVE.
S**S
Really good for quieting your mind before bed.
I suffer with a very active mind especially when I go to bed, my mind runs wild and I think of all sorts so much so that I can feel my heart racing and I can't sleep. These really do help to ease a racing mind so I highly recommend for that.
D**L
Excellent Value!
These will last you ages, they are double strength easy to swallow and excellent value.
F**D
Good
I love and always purchase. Had helped with my energy and concentration.
R**A
Defective and non returnable.
The supplement has no impact what so ever. It does nothing. No effect at all. You will feel the same way you felt before taking them. You can't return the product for being defective either. A total waste of money. Do not bother. This is the second time I have tried to buy a supplement from Amazon and found it to be completely ineffective. The first time I ordered a supplement that had worked for me in the past, so was very surprised it didn't. At least I was able to return that one. Nutricost or Amazon will not allow a return for this. Do not waste your money. It will not help you sleep, it will not improve your focus. It also has ingredients that are not shown in the product image (rice flour). I remain tired, stressed, and now extremely disappointed.
S**N
The product turned out to be very good and it is 100% original and it has no side effects and it is great to use it is amazing and unique and you will get a lot of relief from its use.
A**R
Ich nehme das Nutricost L-Theanine 200 mg jetzt seit einigen Wochen täglich und bin wirklich begeistert von der Wirkung. Für mich ist L-Theanine die perfekte Ergänzung, um in stressigen Situationen entspannter zu bleiben und trotzdem konzentriert zu bleiben – ob bei der Arbeit, beim Lernen oder einfach im Alltag. Die Dosierung mit 200 mg pro Kapsel ist ideal: ausreichend stark, um eine spürbare Wirkung zu erzielen, ohne müde zu machen. Ich merke, wie ich ruhiger und gelassener werde, ohne an Leistungsfähigkeit einzubüßen. Das ist gerade bei hektischen Tagen eine echte Hilfe. Das Produkt ist hochwertig verarbeitet, die Kapseln sind leicht zu schlucken und geschmacksneutral – was für mich sehr wichtig ist. Außerdem sind sie frei von unnötigen Zusatzstoffen, was mein Vertrauen in die Qualität nochmal erhöht. Preislich finde ich Nutricost sehr fair, vor allem bei der Menge, die man bekommt. Die Lieferung war schnell, und die Verpackung ist praktisch und übersichtlich. Fazit: Für alle, die auf natürliche Weise entspannter und fokussierter sein möchten, ist das Nutricost L-Theanine 200 mg eine ausgezeichnete Wahl. Ich werde es definitiv weiterhin nehmen und kann es uneingeschränkt empfehlen!
A**N
Honnêtement ça a changé mon quotidien instantanément, je suis de nature tendu de base. La non seulement il y’a détente corporelle, mentale et il facilite le sommeil. Pris à la base pour atténuer les symptômes d’une pathologie chronique, je ne pense pas pouvoir m’en passer. Et surtout aucune lourdeur ou sédation, au contraire on se sent juste posé et serein. Je ne peux que recommander!
A**R
This supplement delivers what it promises: a potent dose of L-Theanine with consistent results. Nutricost has put together a clean, no-nonsense capsule that’s a great value for stress relief, improved sleep, and focus. 🔹 High Potency, Low Fuss Each capsule packs 200mg of L-Theanine, which is double the dose many competitors offer. With 120 servings per bottle, it's a budget-friendly, long-lasting option. The bottle is clearly labeled, and the capsules are vegetarian and gluten-free — big plus. 🔹 Reliable for Relaxation and Focus User reviews on page 5 and 6 highlight how this product helps take the edge off stress, smooth out caffeine jitters, and even promote better sleep when paired with magnesium. There’s a common theme of users feeling calmer without drowsiness. ✅ Pros: High potency (200mg per capsule) Non-GMO, gluten-free, and vegetarian Manufactured in a GMP-compliant facility Improves calmness and reduces anxiety Works well with caffeine or magnesium for added effect ❌ Cons: Some users may prefer a lower dose option Effects may vary individually — some report minor stomach discomfort Overall: A clean, effective L-Theanine supplement at a competitive price. It shines in helping you stay focused and calm under pressure without the grogginess. A great addition to your daily routine for managing stress and sleep.
M**C
ストレスが溜まった時や、夜に服用しています。効果は弱いが、副作用のない精神安定剤って印象です。1日2500mg摂取しても、副作用が認められなかったという臨床試験データが、ネットにあったので、気軽に服用しています。一時期ストレスでかなりイライラしていたので、1日10回位飲んでいましたが、問題ありませんでした。
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