Last updated: 17/10/2022

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L Theanine is an amino acid that can be found in green tea. It has been shown to promote relaxation without drowsiness and may help reduce stress, anxiety, and depression.

L Theanine: Bestsellers and current offers in the UK

The best l theanine in the UK: Our selection

Looking for a Stress-Free Way to Relax? Try Our Green Tea Extract.

If you’re looking for a stress management and relaxation supplement that’s letterbox friendly and environmentally friendly, look no further than our green tea extract. Our high quality pharmaceutical grade ingredients are manufactured in the UK under GMP in an ISO accredited facility, meaning you can trust in the potency and safety of our product. Minimalist slimline packaging slips directly through your letterbox- so there’s no need to wait in or visit the post office. L-theanine is an amino acid found naturally in tea leaves which promotes relaxation. It also supports a healthy cardiovascular system and brain and nervous system. So why not try out our green tea extract today?

Relax and de-stress with our L-Theanine supplement

Looking for a way to relax and de-stress without the use of artificial ingredients? Look no further than our L-Theanine supplement. Each serving of one capsule provides 300mg of premium L-Theanine, with absolutely no artificial binders or fillers. L-Theanine is a compound that occurs naturally in green tea and black tea, and it is also available in supplement form. We’ve stripped away the caffeine and other additional ingredients found in green tea extract leaving only L-Theanine. Our l-theanine supplement is dairy, gluten and allergen free and suitable for vegans and vegetarians manufactured in ISO licenced facilities in the UK – our UK based team of experts source only the highest quality ingredients that meet our strict quality control and hygiene standards. This product is non GMO

Reduce stress and anxiety with Solgar’s L-Theanine 150 mg

If you’re looking for a natural way to reduce stress and anxiety, look no further than Solgar’s L-Theanine 150 mg. This non-dietary amino acid and natural phytochemical is commonly found in green tea, and has been shown to improve mental function and alleviate stress. Just take one capsule twice daily for maximum effect. Plus, our commitment to sustainability means that all of our products are packaged in 100% recyclable amber glass bottles. When it comes to your health, trust the gold standard – Solgar.

L Theanine: Frequently asked questions

What types of L Theanine are there and what determines a good product?

There are many different types of L Theanine. Some have added caffeine, some do not. We carry the purest form available and it is 100% natural with no additives or fillers. It comes in a powder that mixes easily into water or your favorite beverage to give you all the benefits without any unwanted side effects.

The quality of L-Theanine is determined by its purity. It should be free from any contaminants and impurities, such as heavy metals or pesticides.

Who should use a L Theanine?

Anyone who wants to feel more relaxed and focused. L Theanine is a great supplement for anyone looking to improve their mood, reduce stress or anxiety, increase focus during the day, or even as a sleep aid at night. It can be used by both men and women of all ages. If you are pregnant it is not recommended that you take this product without consulting your doctor first.

Based on what criteria should you buy a L Theanine?

The simplest way to choose the most suitable L-Theanine is by considering your personal requirements. Make sure that the L-Theanine you get suits your needs. For instance, if you’re looking for a supplement to help with anxiety and stress relief, then make sure it contains high levels of this amino acid. Also consider whether or not there are any other ingredients in addition to L-theanine as these may affect how well it works for you personally.

Make sure you compare the specifications of the L Theanine. You should look at the weight, material, warranty, and other details to find a good product.

What are the advantages and disadvantages of a L Theanine?


The advantages of a L-Theanine are that it is non addictive, has no side effects and can be used by anyone. It also helps to promote relaxation without drowsiness.


It doesn’t have any side effects. The only disadvantage is that it has to be taken in the right dosage and at the right time for you to get its full benefits. If not, then there will be no effect on your body or brain.

Shopping Guide: Everything you need to know

Which brands and manufacturers are represented in our review?

In our review, we present products from various manufacturers and suppliers. The list includes products from the following brands and manufacturers, among others:

  • Mindful Matter
  • Focus

What is the price range of the featured products?

The cheapest L Theanine in our review costs around 9 pounds and is ideal for customers who are conscious about their money. However, those who are willing to spend more money for better quality can also spend around 25 pounds for one of the more expensive products.