Green Tea Extract
L-Theanine 100mg

100% naturally sourced

Premium, natural green tea extract with 100mg bioactive L-theanine per capsule. Ultra-pure, custom extraction process using only water and food grade ethanol. Derived from selected green tea leaves, sourced from pesticide-free cultivation in Fujiang, Guangxi and Yunnan; remote mountain regions in China. The extract undergoes a cleansing process that prevents the presence of extraction residues. Gently decaffeinated. Vegan, non-GMO, gluten-, fructose-, lactose- and soy-free. 120 capsules
  • 100mg of bioactive L-theanine per capsule, from ultra-pure green tea extract (Camellia sinensis)
  • L-theanine is an amino acid similar to glutamine that occurs naturally almost exclusively in the green tea plant 
  • Made only from pesticide-free leaves of green tea (Camellia sinensis) in a drink quality
  • From remote mountain regions in the Chinese provinces of Fujiang, Guangxi and Yunnan
  • Gentle extraction process using only water and food grade ethanol
  • Strictly monitored cleansing process following each extraction in order to avoid residues
120 capsules

Delivery : 1–3 business days

Incl. VAT, excl. Shipping

€660.16 / 1kg
In stock

Premium Bioactive Ingredients

  • L-theanine from premium extract of green tea leaves (Camellia sinensis
  • 100mg of bioactive L-theanine per capsule
  • Custom-made for us from decaffeinated, 100% pesticide-free green tea leaves
  • Gentle extraction process using only water and food grade ethanol
  • Strictly monitored cleansing process following each extraction in order to avoid residues
  • High-purity capsule shells made from vegetable cellulose (HPMC), vegan, free from carrageenan and PEG

How are we different?

Rather than using theanine from synthetic production, which is widely available on the market, we use plant-based L-theanine from the green tea plant (Camellia sinensis). Green tea extract not only offers a natural source of L-theanine but also contains many other phytochemicals including catechins and flavonoids, as well as amino acids.

The tea leaves for our green tea extract are sourced from a collective of tea farmers from remote regions in the provinces of Fujiang, Guangxi and Yunnan, China, some of whom have over 20 years' experience in growing green tea. These mountainous regions offer an optimal climate for the tea plants. The leaves are harvested only once per year, in spring, when they are particularly rich in valuable catechins. Around 500-900 tonnes of green tea leaves are needed for a single extraction.

We use a strictly monitored, custom extraction process to obtain our green tea extract. Using plants cultivated without the use of pesticides does not always guarantee a pesticide-free end product, as the plants can still come into contact with pesticides and pollutants during processing. This is why we ensure that the machines used for production are thoroughly cleaned following previous extractions, so that there are no residues which can be absorbed.

Around 4kg of green tea extract, with a theanine content of 60%, is produced from 1,000kg of green tea leaves. Our extract contains only the bioactive theanine form, L-theanine, and no D-theanine.

For the capsule shells we use custom-made HPMC capsules that, unlike most other HPMC and pullulan capsules on the market, are 100% free from controversial additives such as carrageenans and PEG. We then package this product in environmentally friendly amber glass.


  • Premium active ingredients in their purest form
  • Sourced directly from the world’s best producers
  • Our select raw materials are the basis of all our formulations
  • Complete avoidance of all unnecessary additives and adjuvants
  • Exclusive use of valuable natural ingredients for additives
  • We voluntarily declare all ingredients
  • All extractions performed without the use of chemical solvents
  • Custom production when necessary, in order to achieve the highest possible level of purity
  • Independent laboratory testing available on product pages
  • Raw materials sourced only from premium suppliers who are committed to fair working conditions
  • Amber glass and compostable pouches used for packaging
  • Vegan capsule shells, free from PEG and carrageenans
  • Packaged in the EU according to HACCP, GMP and ISO 22000:2018 standards
  • Stored in non-toxic containers
  • Shipped in mineral oil-free boxes
  • All products guaranteed 100% free from magnesium stearate, silicon dioxide, nanoparticles (no legal opportunism), genetic engineering, artificial colours and flavours, titanium dioxide and added sugar & sweeteners


Recommended Dosage

Take up to 2 capsules (100mg L-theanine per capsule) with 200ml water daily.

Food Supplement

Do not exceed the recommended dose. Food supplements cannot replace a balanced and varied diet.


Keep out of reach of children. Store in a cool, dry and dark place.


Ingredients: Green Tea Extract (pesticide-free) with L-Theanine.
Capsule shells: Hydroxypropyl Methylcellulose.
Contains: 120 capsules

Ingredients / 2 Capsules % NRV*
L-Theanine (from Green Tea Extract) 200 mg -**

* Nutrient Reference Value
** no reference available

Per capsule: 100 mg L-theanine
In total: 12 g L-Theanine / jar

Product details

German Pharmaceutical Number (PZN) 17243959
Origin Green tea sourced from pesticide-free cultivation in the tea regions of Fujiang, Guangxi and Yunnan, in China

In-house production in Europe, bottling and encapsulation in the EU according to HACCP, GMP / ISO 22000:2018 standards

Finished products packaged in amber glass jars, and stored in non-toxic containers

Shipping in mineral oil-free boxes

Capsules Plant-based cellulose (HPMC). Vegan
Premium HPMC quality: Free from controversial additives such as carrageenans and PEG
Packaging Amber glass jar to protect against light and oxidation (free from plasticisers and BPA).
To Reuse

Remove product label by soaking the jar in warm water for 5 minutes. Glue residue can be removed with dish soap.

Laboratory Tests

The purity of our formulas is important to us. This is why we have both our raw ingredients as well as our finished products extensively tested by independent laboratories to confirm purity and active ingredient content. Here, we have provided the results of some of the tests carried out on this product.

Sunday Natural

Our Philosophy

For thousands of years, cultures all over the world have been using medicinal plants and nutritious foods to naturally foster and maintain vitality and good health.

With our products, we try to emulate this ancient wisdom as much as possible.

Consequently, our philosophy is simple: everything we do meets the highest standards of quality and purity; our focus is on organic and natural ingredients.

We follow this philosophy with meticulous care on all levels and down to every last detail.

Learn more

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