Skip to product information
1 of 8

Klaire Labs L-Theanine – 100mg Suntheanine (60 Capsules)

Klaire Labs L-Theanine – 100mg Suntheanine (60 Capsules)

Regular price £34.95 GBP
Sale price £34.95 GBP Regular price
Save % Sold out

HOT PRODUCT | LOW STOCK

Carefully selected from trusted wellness brands

Free worldwide delivery

Secure checkout

Buy More Save More!

Klaire Labs L-Theanine – 100mg Suntheanine (60 Capsules)

Regular price £34.95
Sale price £34.95 Regular price
Save % Sold out
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Tracked worldwide delivery. Estimated arrival between - and -.

Key Benefits of L-Theanine for Relaxation

L-theanine supports the body's innate relaxation mechanisms. It is believed to boost the levels of calming neurotransmitters like serotonin, dopamine, and GABA, while curbing excess glutamate activity. Studies indicate that L-theanine promotes a state of calm focus, without the drowsiness caused by many other relaxants.*

  • Promotes relaxation: Helps ease tension and supports a calm state of mind.*
  • Non-drowsy calm: Unlike many relaxants, L-theanine does not cause drowsiness, making it suitable for daytime uses.*
  • Neurotransmitter support: Supports healthy levels of key brain chemicals involved in mood and stress response.*

What Is L-Theanine?

L-theanine is a distinctive amino acid naturally present in green tea leaves. It is celebrated for its capacity to induce a calm yet alert condition without inducing sleepiness. Consequently, it is a favoured option for individuals aiming to handle daily stress while preserving concentration and mental sharpness.*

Why Choose Suntheanine?

Suntheanine represents a patented, pure variant of L-theanine created via a distinct fermentation method that replicates the natural substance in green tea. Clinical trials employing Suntheanine have shown its efficacy in fostering relaxation and enhancing sleep quality without morning grogginess. Each capsule provides 100mg of Suntheanine, delivering a reliable, premium dose.*

How to Uses Klaire Labs L-Theanine

Take one capsule daily as a dietary supplement, or follow the guidance of a health care professional. For optimal results, consume with or without food. The bottle contains 60 capsules, sufficient for a two-month supply at the suggested dose.

Quality and Purity

Klaire Labs has earned the trust of health care practitioners since 1969. This L-theanine is designed with sensitive individuals in consideration. It is devoid of common allergens such as milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, soybeans, and yeast. No artificial colours, flavours, or preservatives are included.

Who May Benefit from L-Theanine?

L-theanine is perfect for people looking for natural assistance with stress management, enhanced focus, and improved sleep. It is especially useful for those who suffer from racing thoughts, occasional anxiety, or trouble relaxing after a hectic day. Since it does not cause drowsiness, it can be used during work or study periods to foster a calm and centred state.*

FAQs About L-Theanine

Is L-theanine safe for daily uses?

L-theanine is generally well tolerated when used as directed. Many people take it daily as part of their stress management routine. However, it is always best to consult with a health care professional before starting any new supplement.

Can L-theanine aid sleep?

L-theanine might enhance sleep quality by encouraging relaxation and decreg wakefulness due to stress. In contrast to sleep medications, it does not directly induce sleep but can facilitate easier falling asleep and a more refreshed awakening.*

Does L-theanine interact with other medicines?

L-theanine is not recognized to interact with most medicines, but if you are taking prescribed drugs for anxiety, blood pressure, or other conditions, consult your health care provider prior to uses.

*These statements have not been evaluated by regulatory authorities. This product is not intended to diagnose, treat, , or prevent any disease.

Worldwide Delivery

Orders are prepared with clear worldwide delivery expectations from the product page through dispatch. Delivery estimates are shown before checkout where available, and tracking details are sent after the order leaves fulfilment so customers can follow the parcel and plan around the expected arrival window.

Returns and support

UK Vitality Vitamins offers straightforward post-purchase support with a clear returns process. Please check the store returns policy before sending an item back, as final eligibility may depend on product condition, packaging integrity and whether the return request is started within the stated return window.

How to choose

Use the product description, ingredient list, serving information and available variants to compare supplement options. Always check the full ingredient list, directions for use and any allergen information on the product packaging before taking any food supplement.

Ingredients and important information

Ingredient lists and formulations may vary by batch or supplier. Always check the product packaging for the most up-to-date information. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Do not exceed the recommended daily intake. If you are pregnant, nursing, taking medication or have a medical condition, consult your healthcare professional before use.

View full details
  • Tracked worldwide delivery

    Clear delivery messaging for shoppers worldwide.

  • Secure checkout

    Secure checkout.

  • Clear returns

    Returns information is written plainly before purchase.

  • Trusted brands

    Carefully selected supplements from established wellness brands.

Supplement guide

Klaire Labs L-Theanine – 100mg Suntheanine (60 Capsules) at UK Vitality Vitamins

Key Benefits of L-Theanine for Relaxation L-theanine supports the body's innate relaxation mechanisms. It is believed to boost the levels of calming neurotransmitters like serotonin, dopamine, and GABA, while curbing ...

Category Amino Acid Supplement
Delivery area Worldwide
Checkout Secure checkout
Brand SFI Health
Price £34.95
Availability In stock
Amino Acid SupplementCalmCognitive FunctionGluten-FreeHypoallergenicKlaire LabsL-TheanineNeurotransmitter SupportNon-DrowsyPractitioner Trusted

How to choose if this supplement fits your routine

Read the ingredient list, check the serving size and directions for use. Consider the supplement form (tablet, capsule, liquid) and whether it suits your dietary requirements. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle.

What UK Vitality Vitamins shows before checkout

Every product page displays price, availability, variant choices, ingredient information, directions for use, allergen details, worldwide delivery expectations and secure checkout — so you can make an informed decision quickly.

Questions about Klaire Labs L-Theanine – 100mg Suntheanine (60 Capsules)

Is Klaire Labs L-Theanine – 100mg Suntheanine (60 Capsules) available with worldwide delivery?

Yes. This product is currently available on UK Vitality Vitamins with free worldwide delivery.

How should I compare this with similar supplements?

Compare the active ingredients, serving size, number of servings per container, supplement form, brand reputation and price per serving. Check allergen information if relevant to your dietary needs.

Where can I find delivery and returns information?

Delivery information is shown near the add to basket area. Returns guidance is available on the product page and full terms are covered in the store returns policy.

Supplement shopping with clarity

UK Vitality Vitamins product pages display ingredients, directions, allergen details and delivery information clearly — so you can compare supplements and make informed choices quickly.