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® powder*:
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
- 23g of herbal taste powder.
- Packaging includes a measuring scoop of 0.5ml volume, which is equal to approximately 200mg of L-Theanine.
- 90+ 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 micotoxins are periodically tested in the laboratory.
- Vegan friendly.
- 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, thiamin (Vitamin B1).
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 scoop of powder before bedtime. Mix with water or other liquid and drink.
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:
1 scoop of powder before bedtime. Mix with water or other liquid and drink.
EFFECT PEAK
1-2 hours
SOURCE OF MATERIAL
High quality Green Tea Leaves extract
Featured in:
What is L-Theanine?
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.
This L-Theanine powder helps with sleep, focus, and anxiety relief. Customers said it "works so effectively" for anxiety and helps with concentration. Most felt refreshed and calmer. One post-menopausal customer didn't notice effects. Praised for quality, fast delivery, and clean composition.
The only product that works so effectively for anxiety!
Combined with magnesium really helps me sleep better.
I've tried many things/supplements over the last 10 years to ease my sleep. Not saying this wouldn't work for a regular person, but being post menopausal sure comes with issues!
B
Bradley Wright
It's like drinking cold green tea
It's like drinking cold green tea, I do tfeel any adverse side effects, stick to same time each day. I can't day if I feel any different though.
A
Aiste
I use L Cell every day�
I use L Cell supplements daily for maximum effect.
V
Vanda
It's definitely worth trying
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 :)
A
Anonymous
Sleep and calm
Take it every night and it has helped with good sleep
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
Anonymous
Good service and products
Good service and 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
A
Agata
I am really pleased with this powder
I am really pleased with this powder, combined with magnesium really helps me sleep better. Thank you.
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.
Can I add L-Theanine powder to my coffee or tea?
No. Supplements should not be added to hot liquids, as this will reduce its potency. But feel free to add it to any cold or room-temperature beverages, food (as it is indicated in the instructions)
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.
