• Life Extension L-Theanine, Amino Acid – Promotes Relaxation: L-theanine encourages alpha brain wave activity, – Image 1
  • Life Extension L-Theanine, Amino Acid – Supports Mood: By influencing neurotransmitters like serotonin and – Image 2
  • Life Extension L-Theanine, Amino Acid – Enhances Focus: The calming effect can improve concentration and mental – Image 3
  • Life Extension L-Theanine, Amino Acid – Non-Drowsy Calm: Unlike many calming agents, L-theanine does not cause – Image 4
  • Life Extension L-Theanine, Amino Acid – High Quality: Manufactured in the USA with strict quality control, – Image 5
  • Life Extension L-Theanine, Amino Acid – Serving Size: 1 capsule – Image 6
  • Life Extension L-Theanine, Amino Acid – Amount Per Serving: L-Theanine 200 mg – Image 7
  • Life Extension L-Theanine, Amino Acid – Other Ingredients: Vegetable cellulose (capsule), microcrystalline – Image 8
  • Life Extension L-Theanine, Amino Acid – Contains no: Gluten, GMOs, soy, dairy, artificial colors or flavors – Image 9
  • Life Extension L-Theanine, Amino Acid – Storage: Keep tightly closed in a cool, dry place – Image 10
  • Life Extension L-Theanine, Amino Acid – Promotes Relaxation: L-theanine encourages alpha brain wave activity, – Image 11
  • Life Extension L-Theanine, Amino Acid – Supports Mood: By influencing neurotransmitters like serotonin and – Image 12
  • Life Extension L-Theanine, Amino Acid – Enhances Focus: The calming effect can improve concentration and mental – Image 13
  • Life Extension L-Theanine, Amino Acid – Non-Drowsy Calm: Unlike many calming agents, L-theanine does not cause – Image 14
  • Life Extension L-Theanine, Amino Acid – High Quality: Manufactured in the USA with strict quality control, – Image 15
  • Life Extension L-Theanine, Amino Acid – Serving Size: 1 capsule – Image 16
  • Life Extension L-Theanine, Amino Acid – Amount Per Serving: L-Theanine 200 mg – Image 17
  • Life Extension L-Theanine, Amino Acid – Other Ingredients: Vegetable cellulose (capsule), microcrystalline – Image 18
1 18

Life Extension L-Theanine, Amino Acid Theanine, Calm, Relaxation, Mood, Gluten-Free, Non-GMO, Vegetarian, 200 mg, 60 Capsules

Life Extension L-Theanine, Amino Acid Theanine, Calm, Relaxation, Mood, Gluten-Free, Non-GMO, Vegetarian, 200 mg, 60 Capsules

£37.57 GBP
£37.57 GBP
Save % Sold out

Buy more, save more

Life Extension L-Theanine, Amino Acid Theanine, Calm, Relaxation, Mood, Gluten-Free, Non-GMO, Vegetarian, 200 mg, 60 Capsules

£37.57
£37.57
Save % Sold out
  • Amazon
  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Product Overview

Life Extension L-Theanine provides 200 mg of the amino acid theanine per capsule, sourced from green tea leaves. This supplement is designed to help you achieve a state of calm relaxation without sedation, making it ideal for managing everyday stress and supporting a positive mood. Each bottle contains 60 vegetarian capsules, free from gluten and GMOs.

Key Features and Benefits

  • Promotes Relaxation: L-theanine encourages alpha brain wave activity, which is associated with a relaxed yet alert state.
  • Supports Mood: By influencing neurotransmitters like serotonin and dopamine, it helps maintain a balanced mood.
  • Enhances Focus: The calming effect can improve concentration and mental clarity, especially during stressful tasks.
  • Non-Drowsy Calm: Unlike many calming agents, L-theanine does not cause drowsiness, making it suitable for daytime use.
  • High Quality: Manufactured in the USA with strict quality control, gluten-free, non-GMO, and vegetarian.

How to Use

Take one (1) capsule daily with or without food, or as recommended by a healthcare professional. For best results, use consistently. Can be taken alone or alongside other supplements.

Who It Is For

This product is ideal for adults seeking a natural way to manage stress, improve mood, and enhance mental focus. It is suitable for vegetarians and those with dietary restrictions, as it is gluten-free and non-GMO. Not recommended for children or pregnant/nursing women without professional advice.

Why Choose This Product

Life Extension is a trusted brand in nutritional supplements, known for science-backed formulations and high-quality ingredients. This L-Theanine supplement provides a pure, potent dose in a convenient capsule form. Backed by decades of research, it offers a safe, effective option for supporting relaxation and cognitive function without unwanted side effects.

Technical Details

  • Serving Size: 1 capsule
  • Amount Per Serving: L-Theanine 200 mg
  • Other Ingredients: Vegetable cellulose (capsule), microcrystalline cellulose, silica, vegetable stearate
  • Contains no: Gluten, GMOs, soy, dairy, artificial colors or flavors
  • Storage: Keep tightly closed in a cool, dry place

Experience the calming benefits of L-Theanine and support your overall well-being with this premium supplement.

Delivery in the United Kingdom

Orders are prepared with clear UK 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

NutriSentra 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
  • Free standard deliveryUsually 5–10 business days to the UK, after 1–3 days to prepare
  • 30-day returnsOn unopened items in original packaging
  • Secure checkoutProcessed by Shopify with major cards accepted
  • Real supportEmail or phone, answered by our team

☆☆☆☆☆

Buying guide and questions

Supplement guide

Life Extension L-Theanine, Amino Acid Theanine, Calm, Relaxation, Mood, Gluten-Free, Non-GMO, Vegetarian, 200 mg, 60 Capsules at NutriSentra

Product OverviewLife Extension L-Theanine provides 200 mg of the amino acid theanine per capsule, sourced from green tea leaves. This supplement is designed to help you achieve a state of calm relaxation without sedat...

Category Food Supplement
Delivery area United Kingdom
Checkout Secure checkout
Brand Life Extension
Price £37.57
Availability In stock
amino acidcalmfocusgluten-freeL-TheanineLife Extensionmood supportnon-GMOrelaxationstress relief

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.

Questions about Life Extension L-Theanine, Amino Acid Theanine, Calm, Relaxation, Mood, Gluten-Free, Non-GMO, Vegetarian, 200 mg, 60 Capsules

Is Life Extension L-Theanine, Amino Acid Theanine, Calm, Relaxation, Mood, Gluten-Free, Non-GMO, Vegetarian, 200 mg, 60 Capsules available for UK customers?

Yes. This product is currently available on NutriSentra with UK 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.

From our guides

View all
1 3
View all