L-Theanine Powder – 23 g green tea extract • 200 mg L-theanine per daily dose • vitamin B1 contributes to normal functioning of the nervous system • food supplement
L‑theanine is an amino acid found naturally in the tea plant. L Cell uses green tea extract containing at least 80% L‑theanine, with added zinc and vitamin B1. Vitamin B1 contributes to normal psychological function and normal functioning of the nervous system; zinc contributes to normal cognitive function.
- In one scoop: 250 mg green tea extract, providing 200 mg L‑theanine; 1.5 mg zinc and 0.165 mg vitamin B1.
- In-house development and production: L Cell develops and manufactures its supplements in its own laboratory in Vilnius, Lithuania.
- Independent lab testing: L Cell commissions regular independent tests for declared ingredient levels, heavy metals and other contaminants.
- Directions: take 1 scoop daily before bed, mixed into water or another cool drink. L Cell describes the flavour as mildly herbal. A measuring scoop is included. The 23 g pack contains 90 daily doses.
L‑theanine powder from green tea extract
Why do we not describe health benefits for L‑theanine itself? We do not have an authorised L‑theanine health claim that we can use in this description. Instead, we explain the permitted functions of this formula’s zinc and vitamin B1. Our FAQs explain the difference between research and an authorised claim.
L‑theanine is an amino acid naturally present in the tea plant. L Cell uses green tea extract to supply 200 mg of L‑theanine per daily dose. Zinc and vitamin B1 sit alongside it as separate ingredients, each with its own functions.
Vitamin B1 contributes to normal psychological function and the normal functioning of the nervous system. Zinc contributes to normal cognitive function. Those functions belong to the added nutrients; they do not transfer automatically to L‑theanine or the combination.
L Cell describes the powder as mildly herbal. Mix one supplied scoop into water or another cooled drink before bed. Choose a small amount that you will finish.
Find the full directions below, with practical answers in our FAQs.
Important information
- Do not exceed the recommended daily dose.
- Food supplements should not replace a varied diet. A varied, balanced diet and a healthy lifestyle are important for good health.
- Keep out of the reach of young children.
- If you take medication, are pregnant or breastfeeding, speak to your doctor or pharmacist before use. Show them the full ingredient list and details of any other supplements you take.
What makes the powder format different?
The powder offers an alternative to swallowing capsules. A scoop is included. Compare the amount of each ingredient per recommended dose and how many days the pack lasts.
- 250 mg of green tea extract. This includes 200 mg of L‑theanine: 80% of the extract by weight.
- 1.5 mg of zinc and 0.165 mg of vitamin B1. Each provides 15% of its nutrient reference value (NRV).
- One dose daily before bed. As directed for this formula.
- 23 g pack: 90 doses, lasting 90 days at one scoop daily.
Prefer a measured amount without tasting the powder? Explore L‑theanine capsules. One capsule supplies the same declared amounts of the main ingredients as the daily powder dose.
L‑theanine, green tea extract and a cup of tea are different things
An extract is a concentrated ingredient obtained from the tea plant; L‑theanine is one substance within it. Here, 250 mg of extract supplies 200 mg of L‑theanine. The remaining extract weight is not an extra amount of L‑theanine.
The 80% figure describes the L‑theanine concentration in the extract. It is not an absorption percentage, or 80% of the whole supplement including zinc, vitamin B1 and any capsule shell. That is why the L‑theanine amount is also stated in milligrams.
Green tea, L‑theanine and caffeine are distinct terms. The plant source alone does not establish how much caffeine this particular supplement contains. Without a specification or test result, we do not call it caffeine-free or equate its dose to a number of cups of tea.
Green tea drops, L‑theanine or EGCG: which formula are you looking for?
A liquid tea extract: Botanicals For Life organic green tea extract combines tea leaf extract with coconut glycerine and water. Its 1:1 ratio describes the amount of plant material used, rather than an L‑theanine percentage. Drops cannot therefore be converted into L Cell scoops or capsules.
A stated amount of L‑theanine: this supplement provides 200 mg L‑theanine from 250 mg green tea extract. It also contains zinc and vitamin B1, with their amounts listed separately in the ingredients table.
EGCG is a different tea compound. If you are looking for this catechin, compare L Cell EGCG powder. L‑theanine is an amino acid; a shared plant source does not make the two interchangeable. Follow the EGCG product’s own warnings, including its instruction not to take other products containing green tea on the same day.
Why add zinc and vitamin B1?
- Vitamin B1 and L‑theanine are not two names for the same substance. B1, also called thiamin, is a vitamin; L‑theanine is an amino acid. Vitamin B1 contributes to normal energy-yielding metabolism, normal psychological function and the normal functioning of the nervous system.
- Zinc contributes to normal cognitive function and the protection of cells from oxidative stress. Its amount is declared separately in the table. These authorised functions explain zinc’s contribution, rather than establishing that it enhances L‑theanine’s effects.
- The full daily dose provides 15% NRV for both zinc and vitamin B1. If you already take a multivitamin or another product containing these nutrients, account for those amounts too. There is no automatic need to add another supplement.
Biohacking: food, movement and daily habits
Biohacking uses science, technology and changes to everyday habits to explore how the body and mind function. It can include adjustments to diet, sleep and exercise, meditation, breathing exercises or tracking selected measurements. Supplements are only one part of that wider picture.
What does biohacking involve?
- Food: a varied diet, regular eating habits and an understanding of nutrient intake.
- Sleep and rest: keeping track of sleep duration, bedtimes and time to rest during the day.
- Movement: regular activity that suits your fitness and circumstances.
- Tracking: a diary, app or wearable device to record habits and how they change.
Keeping a record helps you see what has changed in your routine. Alter your diet, exercise and several supplements at once, and it becomes harder to identify what made a difference. Consistency and a clear record of what you take are useful starting points.
Where do supplements fit in?
Compare ingredients, quantities and directions, rather than relying on a product name alone. With L Cell supplements, look at the main ingredients, added vitamins and minerals, powder or capsule format, and laboratory documentation. A varied, balanced diet and a healthy lifestyle remain the foundation.
PraveBio also stocks brands with different specialisms. NoordCode offers functional foods and supplements, including MCT oils, collagen and electrolytes.
Jigsaw Health is an American family business founded in 2005 by Pat Sullivan and his son, Patrick Sullivan Jr. Magnesium and other mineral supplements feature prominently in its range.
BiOptimizers makes food supplements, including enzyme formulas such as the MassZymes digestive enzyme range. Each brand and product has its own composition, so compare the specific formula you are considering.
L Cell: its own laboratory and independent checks
L Cell develops and manufactures food supplements. The brand identifies its own laboratory in Vilnius, Lithuania, as the place where its formulas are made. That gives customers a traceable production location and a clearer picture of the company behind the range.
The range includes glycine with NAC, botanical extracts containing quercetin or resveratrol, and mineral supplements. Many products come as both powders and capsules. Choose the format that suits your routine, while checking the specific ingredients and daily dose for each pack.
Independent laboratories regularly check declared content and unwanted substances, including heavy metals and mycotoxins. Content testing measures the substances analysed; contaminant testing looks for unwanted impurities. Results apply to the sample and tests identified in the laboratory report.
The brand’s documentation also includes GMP and ISO 22000:2018 certificates issued to Longevita Lab and H Drop B.V. Their stated scope covers the development and sale of food supplements and snack foods. They document defined procedures and management systems; ingredient quantities require separate analytical testing.
In-house development and manufacture
L Cell identifies its own Vilnius laboratory as the site where it develops and makes supplements. You can trace the range beyond the brand name to a specific production location.
Powders or capsules
Many formulas are available in both formats. Choose between mixing into a drink and swallowing capsules, then check each ingredient amount against the recommended daily dose for that particular product.
Independent laboratory testing
Analysis covers declared ingredients and unwanted impurities. The report identifies what was measured and which sample was tested, giving you specific information about the material examined.
GMP and ISO 22000:2018
The published certificates cover the stated scope of development and sales. ISO 22000:2018 concerns food safety management systems; a laboratory analysis provides the separate evidence for ingredient quantities in a tested product.
Ingredients
Green tea extract (containing at least 80% L‑theanine), zinc, thiamin (vitamin B1).
Daily dose: one scoop
| Substance | Amount per scoop | % NRV* |
|---|---|---|
| Green tea extract of which L‑theanine |
250 mg 200 mg |
* * |
| Zinc | 1.5 mg | 15 % |
| Thiamin (vitamin B1) | 0.165 mg | 15 % |
NRV = nutrient reference value. * No NRV established. Percentages refer to zinc and vitamin B1. The table shows the full daily dose of one scoop or one capsule.
Directions
- One scoop daily before bed. Use the scoop included in the pack.
- Mix with water or another cooled drink and drink the full prepared amount.
- Let hot drinks cool first; do not estimate the dose with a kitchen teaspoon.
- 23 g pack: 90 doses, lasting 90 days at one scoop daily.
Storage
- Keep in a cool, dry, dark place, out of the reach of young children.
- Close the container after use and protect the contents from moisture. Check the best-before date on your pack.
L‑theanine FAQs
Why do you not describe health benefits for L‑theanine itself?
A scientific study and an authorised health claim serve different purposes. A study investigates a substance under particular conditions; its existence does not by itself allow its findings to be used as food marketing claims.
We do not have an authorised claim for L‑theanine that can be used in this description. We explain the ingredients and directions instead. For zinc and vitamin B1, we describe their authorised functions where the conditions are met. Those benefits belong to the individual nutrients and cannot automatically be attributed to L‑theanine.
What do 250 mg of extract and 200 mg of L‑theanine mean?
The 200 mg of L‑theanine is included within the 250 mg of extract, rather than added on top. It accounts for 80% of that plant ingredient by weight. Do not add the two figures together to make 450 mg.
A concentration is not an absorption rate. Zinc and vitamin B1 are declared separately, so the extract weight does not establish the exact weight of the complete powder blend either.
Is L‑theanine the same as vitamin B1?
No. L‑theanine is an amino acid; vitamin B1 is thiamin. This supplement contains both, in different amounts: 200 mg of L‑theanine and 0.165 mg of vitamin B1 per daily dose.
The claims about normal psychological and nervous system function belong to vitamin B1 here. Similar-sounding names do not mean a vitamin’s functions can be assigned to L‑theanine.
Does this L‑theanine contain caffeine?
The available composition table does not quantify caffeine. Green tea is the plant source, but that fact alone does not establish the caffeine content of this extract. Without a specification or test result, we do not promise a zero level.
If you need to avoid caffeine strictly, request confirmation for this product before choosing it. L‑theanine and caffeine are different substances: 200 mg of L‑theanine does not mean 200 mg of caffeine.
How do L Cell powder and capsules compare?
Each daily dose provides 250 mg of extract, including 200 mg of L‑theanine, plus 1.5 mg of zinc and 0.165 mg of vitamin B1. The capsule adds an HPMC shell, while the powder is measured with a scoop.
Choose the preparation method you prefer. Measure the powder and stir it into a drink, or swallow a capsule with water. The capsule pack contains 30 daily doses. Follow the directions for your chosen format.
What does the powder taste like, and how do I mix it?
L Cell describes a mild herbal taste. Try a small amount of water or another cooled drink you enjoy. Stir in one scoop and drink the full prepared amount.
You do not need to prepare a large glass. Choose an amount you can comfortably finish; the powder dose stays the same. The taste description is not a promise that everyone will perceive it identically.
Can I mix L‑theanine into hot coffee or tea?
Choose a cooled drink for the powder. L Cell advises against adding it to hot liquids. Let tea cool first; this instruction does not establish a precise breakdown temperature for the finished blend.
This product is directed to be taken before bed. Coffee or another caffeinated drink is not an automatic choice for an evening serving. Your choice of drink does not change the recommended dose.
Can L‑theanine replace treatment for anxiety or insomnia?
No. It is a food supplement, rather than a medicine. Evening directions do not guarantee sleep or provide a treatment plan for anxiety. Persistent symptoms should be discussed with a doctor.
Do not change prescribed treatment yourself. If you take medication, ask a doctor or pharmacist about the combination and show them the whole formula, including zinc and vitamin B1.
How should I store L‑theanine?
Keep it cool, dry and away from light, out of the reach of young children. Close the container after each use. For the powder, use a dry scoop and do not return a damp scoop to the pack.
Follow the best-before date on your container. Unless the label directs otherwise, refrigeration is not automatically necessary; protecting the contents from moisture matters.
What do L Cell laboratory reports check?
Measuring selected ingredients and testing contaminants are different checks. A result applies to the particular sample and the tests listed in the report, such as ingredient content or heavy metals.
A laboratory report is not a clinical study of the finished supplement. It does not automatically demonstrate a sleep benefit or a zero caffeine level unless caffeine was tested. Find the shared testing background in the brand section.
Additional parameters
| Category: | Sleep, Stress & Nervous System |
|---|---|
| EAN: | 4779060270390 |
| Product type: | Food supplement |
| Format: | Powder |
| Contents: | 23 g |
| Recommended daily dose: | 1 scoop |
| Number of daily doses: | 90 |
| Source of the main ingredient: | Green tea extract |
| Main ingredients per 1 scoop: | Green tea extract: 250 mg; of which L‑theanine: 200 mg |
| Zinc per 1 scoop: | 1.5 mg |
| Thiamin (vitamin B1) per 1 scoop: | 0.165 mg |
| Suitable for: | Vegetarian-Vegan-Gluten free-Soy free-Nut free-Sugar free-Lactose free-GMO free-Low carb-Paleo-Keto |
| Manufacturer: | L Cell Ltd. |
| Country of origin: | EU |
| Storage: | Keep in a cool, dry, dark place, out of the reach of young children. |
| Exclusive distributor for the Czech Republic: | Pravé Bio |
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L Cell is a Lithuanian food supplement brand with its own laboratory in Vilnius. Its range includes botanical extracts, amino acids and mineral supplements, with many products available as both powders and capsules.
Pravé Bio is the exclusive L Cell distributor for the Czech Republic. Our product pages set out the ingredients, quantities per daily dose, directions and available laboratory documents, so you can compare the details of each pack. Read about the maker and its documentation here, or explore the L Cell supplement range to choose a product.
Inside L Cell’s Vilnius lab
- Developed in-house. L Cell develops and manufactures its supplements in its own laboratory in Vilnius, Lithuania.
- Independently tested. The brand regularly commissions checks on declared ingredient content and unwanted substances. Available reports sit alongside the relevant products.
- The full ingredient picture. Our product tables distinguish the main compound from its botanical extract, with added zinc and vitamins listed separately.
- Powder or capsules. Many products come in both formats. Each has its own ingredient quantities, directions and pack size, so you can compare the details before choosing.
Food supplements
Botanical extracts
Amino acids
Minerals
Where L Cell supplements are made
Product development and manufacturing in Vilnius are part of L Cell’s own operation. The brand publishes its laboratory address and information about product testing; each supplement still needs to be considered individually.
The range includes GlyNAC with glycine and NAC, botanical extracts such as apigenin and resveratrol, and magnesium supplements. These are different ingredients, with distinct compositions and directions.
Research into an ingredient does not establish the effects of every supplement containing it. Our descriptions distinguish ingredient information from health claims applicable to a particular nutrient and dose.
Pravé Bio and L Cell
Pravé Bio, NUZBOZ s.r.o., is L Cell’s exclusive distributor for the Czech Republic. Our shop carries individual L Cell product ranges and their available formats.
We check ingredient identity, quantities and the full ingredient list. For botanical extracts, we distinguish the weight of the extract from the amount of the specified compound within it.
Powders and capsules from the same range may differ. For example, GlyNAC powder and the capsule version have different glycine-to-NAC ratios; the individual product tables show those differences.
Match your question to the exact product. When comparing options, use the product name, format and pack size. For a laboratory report, also check the sample or batch identification.
Laboratory testing and certificates
Ingredient testing and contaminant testing answer different questions. One measures the amount of an analysed ingredient; the other checks for unwanted substances such as heavy metals. The brand’s documentation includes GMP and ISO 22000:2018 certificates issued to Longevita Lab and H Drop B.V. Their stated scope covers the development and sale of food supplements and food snacks.
A management-system certificate does not replace a product analysis. A laboratory result applies to the identified sample, measured substances and method. It does not establish rejuvenation or another health outcome.
Compare like with like: the main ingredient, its amount per daily dose, the other ingredients and the number of doses in the pack.
How to choose from the L Cell range
Main ingredient and what you want to learn about it
Daily-dose quantities, including added nutrients
Format: powder or capsules
Restrictions: allergens, warnings and existing treatment
What our product pages explain
Ingredients and quantities
Directions and storage
Differences between formats
FAQs and available documentation
Product-specific warnings
| Manufacturing company : | L Cell Ltd. |
|---|---|
| Address : | Mokslininkų g. 2 Vilnius LT-08412 Lithuania |
| E-mail : | info@lcell.co.uk |
