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Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count

Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count

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Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count

Regular price £35.00
Sale price £35.00 Regular price
Save % Sold out
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Product Overview

Doctor's Best L-Theanine is a premium dietary supplement featuring Suntheanine, a patented form of L-theanine that has been extensively researched for its calming and focus-enhancing properties. L-theanine is an amino acid naturally found in green tea leaves, known for its ability to promote a state of relaxed alertness without sedation. This supplement is designed to help you manage everyday stress, improve sleep quality, and support cognitive function.

Key Features and Benefits

  • Stress Reduction: L-theanine promotes alpha brain wave activity, which is associated with a calm and relaxed mental state. It helps reduce the physical and mental effects of stress without causing drowsiness.
  • Better Sleep: By calming the mind, L-theanine can improve sleep quality and help you fall asleep more easily. It works synergistically with your body's natural sleep mechanisms.
  • Enhanced Focus: Unlike sedatives, L-theanine supports concentration and mental clarity. It can help you stay focused during tasks while maintaining a sense of calm.
  • Suntheanine Quality: Suntheanine is the purest form of L-theanine available, produced through a patented fermentation process that mimics the natural compound found in green tea. It is free from synthetic byproducts.
  • Clean Label: This product is Non-GMO, Gluten Free, Vegan, and contains no artificial additives or preservatives. It is suitable for a wide range of dietary needs.

How to Use

As a dietary supplement, take one (1) capsule of Doctor's Best L-Theanine daily, preferably on an empty stomach or as directed by a healthcare professional. For stress relief, take it during the day as needed. For sleep support, take it 30-60 minutes before bedtime. Do not exceed the recommended dosage unless advised by a qualified practitioner.

Who It Is For

Doctor's Best L-Theanine is ideal for adults experiencing daily stress, those looking to improve sleep quality without medication, students or professionals needing mental clarity, and anyone seeking a natural way to support relaxation. It is also suitable for vegans and individuals with gluten sensitivities.

Why Choose This Product

With 150 mg of Suntheanine per capsule, this supplement delivers a research-backed dose of the most studied form of L-theanine. Doctor's Best is a trusted brand committed to quality and purity, ensuring you receive a product that meets high standards. The 90-count bottle provides a three-month supply, making it a convenient and cost-effective choice for ongoing support.

Technical Details

Each capsule contains 150 mg of L-theanine (as Suntheanine). Other ingredients: microcrystalline cellulose, vegetable stearate. Free from: gluten, soy, dairy, egg, fish, shellfish, tree nuts, peanuts, and wheat. Manufactured in a GMP-certified facility.

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.

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Supplement guide

Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count at NutriSentra

Product OverviewDoctor's Best L-Theanine is a premium dietary supplement featuring Suntheanine, a patented form of L-theanine that has been extensively researched for its calming and focus-enhancing properties. L-thea...

Category Food Supplement
Delivery area United Kingdom
Checkout Secure checkout
Brand Doctor's BEST
Price £35.00
Availability In stock
Cognitive HealthDoctor's BestGluten FreeL-TheanineNon-GMORelaxationSleep SupportStress ReliefSuntheanineVegan Supplement

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 NutriSentra shows before checkout

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

Questions about Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count

Is Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count 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.

Supplement shopping with clarity

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