7.000+

Bewertungen mit einem Durchschnitt von 4,9/5

100.000+

Zufriedene Kunden

2-Tage

Durchschnittliche Lieferzeit

99,6%

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FAQs

Delivery and Payment

Orders within the Czech Republic and Slovakia are usually delivered within 1–3 business days.

For all orders over 1,490 CZK (€60), shipping is completely free!

For smaller orders, delivery within the Czech Republic costs:

  • To a pickup point (Zásilkovna / PPL) – 69 CZK
  • To your address (PPL / GLS) – 89 CZK

For orders shipped to Slovakia, delivery costs:

  • To a pickup point (Packeta) – €3.49
  • To your address (GLS) – €4.49

You can pay for your order using the following payment methods:

  • Credit or debit card
  • Apple Pay, Google Pay, or Shop Pay
  • Bank transfer / QR code
  • 3 interest-free installments via the Klarna payment gateway
What is L-Theanine, and where does it come from?

L-Theanine is a naturally occurring amino acid found almost exclusively in green tea leaves (Camellia sinensis).

It has a unique ability to calm the mind, reduce stress, and support focus - without making you feel sleepy.

How does L-Theanine work?

L-Theanine supports the production of alpha brain waves, which are linked to a calm but focused state. It helps you handle stress better, improves concentration, and can contribute to faster recovery after a mentally and physically demanding day.

Can I take L-Theanine long-term?

Yes, you can. L-Theanine is a natural compound that the body does not build tolerance to. With regular use, it can help reduce stress and anxiety over the long term.

Can I combine L-Theanine with caffeine?

Yes, it’s actually one of the most popular combinations. L-Theanine helps balance the effects of caffeine by reducing jitters, a racing heart, and the sudden “crash.” The result is steadier energy, better focus, and calm under pressure.

Will L-Theanine help with stress or anxiety?

Yes, L-Theanine is known for its calming effects. It can help reduce tension, quiet the mind, and improve your response to stress - without making you sleepy.

However, it does not replace professional treatment for anxiety or stress-related disorders.

Couldn't find an answer to your question?

In that case, please visit our general FAQs.

Alternatively, contact us at info@officialcomplex.com. We will handle your question or request within 24 hours.

Disclaimer

This product has been placed on the market as a dietary supplement. It is not a medicine or a substitute for a varied diet. The minimum shelf life is stated on the packaging. The purpose of the information provided here is not to increase the consumption or sales of products. We do not encourage inappropriate, excessive, or unjustified use of the product. Always consult a doctor regarding the active ingredients and the use of the product. Store in a dry, cool place, out of reach of children.

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