Optimal formula of L-Theanine (200mg per serving).
For someone looking to calm down the mind and increase daily focus*.
Benefits of L Cell L-Theanine® capsules*:
Mental Health. Contributes to normal psychological and nervous system functions.
Weight Control. Contributes to normal carbohydrate, macronutrient and fatty acids metabolism.
Longevity. L-Theanine is an autophagy modulator that stimulates "recycling" of damaged cell components and antioxidant that combats free radicals.
You can choose this product in capsule or powder form:
Product Information and Ingredients
- 30 capsules in the package, 200mg of L-Theanine in each. - 30+ days of strong servings. - Over 80% purity. - Natural: produced from full spectrum green tea extract. - Guaranteed active ingredients amount and safety: composition, heavy metals and mycotoxins are periodically tested in the laboratory. - Vegan friendly: capsule coating is produced from HPMC (hypromellose) instead of bovine gelatin. HPMC is a safe water soluble substance which easily disolves in the digestive tract. - Produced in pharma-grade European facilities. - No GMOs, artificial colors, preservatives, flavours or allergens.
Ingredients: green tea extract (of which at least 80% L-Theanine), zinc gluconate, thiamin , vegan HPMC capsule coating.
Keep in cool dark place, out of the reach of children.
This product is not intended to diagnose, treat, or cure any disease.
Shelf life: 24 months.
Country of origin: EU
Recommended Use
1 capsule before bedtime. Swallow with water.
Laboratory reports & certificatesDelivery
Free UK delivery (Royal Mail 48 Tracked) on orders over £60!
Delivery price on orders under £60:
- Royal Mail 24 Tracked (1 working day) -£4.99
- Royal Mail 48 Tracked (up to 3 working days) - £3.99
All parcels are dispatched on working days at 6:00 PM. To ensure same-day dispatch, please place and pay for your order before 6:00 PM.
30 Days Money-Back Guarantee
Not satisfied with the product’s effect, taste or quality?
All L Cell products are covered by a 30-day money-back guarantee.
If you wish to return your purchase, please register and ship your return through the automated RoyalMail system:
L-Theanine is a naturally occurring amino acid commonly found in green tea that is known for its calming effects.
It's popular in longevity supplements due to its potential to support relaxation, mental clarity, and stress management without causing drowsiness.
L-Theanine is valued for promoting a balanced mood and helping maintain focus, making it a useful addition for those looking to support overall mental wellness and healthy aging.
How does L-Theanine work?
L-Theanine works by increasing the levels of calming brain chemicals like serotonin and dopamine, which help promote relaxation and reduce stress.
It also helps to balance brain activity, enhancing focus and mental clarity without causing drowsiness.
By supporting a calm and clear state of mind, L-Theanine helps improve overall well-being and mental performance, making it a valuable supplement for maintaining a balanced and healthy lifestyle.
Customers praised these L-Theanine capsules for improving focus and concentration, with one noting "better focus and ability to maintain concentration" after just days. Shoppers reported feeling more refreshed and reduced anxiety. The supplements received consistent 5-star ratings for quality and clean composition, with fast delivery highly appreciated.
Better focus and ability to maintain concentration after just a few days
The only product that works so effectively for anxiety!
Quick delivery, nicely packed. I experienced first positive effects of the product after using it just for a few days: better focus and ability to maintain concentration.
A
Aiste
I use L Cell every day�
I use L Cell supplements daily for maximum effect.
V
Vanda
It's definitely worth a try.
It's definitely worth trying. I felt fresh, more focused.
M
Marius
I recommend it to those who suffer anxiety. The only product that works so effectively! After using it for a couple of weeks, I couldn't believe that you can feel so psychologically good :)
L
Lawrence K.
Very fast delivery
Very fast delivery. Exclusive prodilucts. Good quality
A
Alex
It took a long time to find a clean composition�
I've been looking for a clean supplement for a long time, and L Cell is the best I've found so far. I've ordered it more than once.
E
Eugene A.
Shopped for the first time
Shopped for the first time. Everything went smooth and fast. Highly recommended. Returning for more products
A
Andrew
Good products
Good products
0
04/10/2025
I tried theanine for the first time
I tried theanine for the first time, it really works. I feel more refreshed, I can concentrate more easily at work :)
0
03/10/2025
Strongly recommend
The package and the delivery was excellent. I love their supplements and will be purchasing again for sure😊 recommend
1
18/08/2025
Great supplements
Great supplements. I do enjoy the subscription, so I don’t have to worry about running out of supplements.
0
05/07/2025
Fast delivery, quality products
Fast delivery, quality products
Longevity is everywhere. Genuine products are rare.
Over 90% of food supplement brands simply resell products made elsewhere. At L Cell we control full path of our products as they are produced in our own GMP-certified lab in Europe.
Manufactured in Our Own Lab
Nowadays, "longevity" is everywhere. At L Cell we focus on the roots of Longevity science. Our supplements target particular molecular pathways in meaningful dosages.
Actual Longevity, Not a Buzzword
Studies show that about 50% of supplements on the market are mislabeled or polluted. We regularly test our products for concentration, heavy metals and contaminants in 3rd-party labs.
Guaranteed Composition
Tired of cheap plastic or excessive packaging? We’ve introduced Aluminium Tins to offer the best of all worlds: 1. Protection against contamination and UV. 2. 100% recyclability. 3. Low resources for production and transport.
Effectiveness of longevity supplements dramatically depends on correct usage method, dosage and synergy between each other.
Our products have been formulated in collaboration with nutritional experts of UCL (London) to ensure maximum anti-ageing elements absorption into cells.
What is Longevity and Healthy Ageing?
A 200-year-long lifespan – this is not just a slogan, but a realistic goal.
In 1961, American scientist Leonard Hayflick discovered that most human cells are capable of dividing up to 60 times during their lifetime before they die.
With each division, they mutate slightly and lose some of their original DNA epigenome information, making our bodies progressively older and more prone to disease.
Fortunately, scientific advances over the past 20 years have shown that there are ways to slow down – and even reverse – the degeneration process.
Frequently Asked Questions
What are side effects of L-Theanine?
L-Theanine is usually well-tolerated, but some individuals may experience mild side effects such as digestive upset or allergic reactions. Starting with a lower dose can help assess tolerance.
What to choose - powder or capsules?
Advantages of powder:
- Powder allows for precise dosage control, making adjustments easier.
- Powder is generally more cost-effective compared to capsules and can be mixed into various liquids for versatility.
Advantages of capsules:
- Convenience as they are easy to take and require no preparation.
- Capsules also mask the taste of powder, which can be beneficial for those sensitive to flavors.
- Capsules provide consistent intake with pre-measured doses.
Your decision should align with your preferences and lifestyle - opt for powder for cost-effectiveness and dosage control, or capsules for convenience and ease of use.
Can I take L-Theanine if I'm already on medication?
Due to potential interactions, discuss L-Theanine use with your doctor before starting it, especially if you take any medications. L-Theanine may influence how your body processes certain medications, potentially impacting their effectiveness.
How should I store the product?
Please store the product in a cool, dry place, away from direct sunlight. If you live in a very hot climate, please store the product in the refrigerator, otherwise it is not necessary.
Is L-Theanine beneficial for anxiety and stress?
Yes, L-Theanine, an amino acid found in tea leaves, is known to promote relaxation and reduce stress without causing drowsiness. It may also help improve focus, reduce anxiety, and support overall mental well-being. For personalized advice, it's best to consult with a healthcare provider.
Still not sure where to start?
We know longevity science can be overwhelming.
That's why we've created a quiz to help you discover a personalized supplement routine.
