Vitality Pro

L-Theanine

L-Theanine is a molecule found in green tea known for promoting calm focus without drowsiness. It supports neurochemical production and enhances alpha brain waves, helping to promote a sense of calm while increasing focus and attention.

Features

  • 200mg per capsule
  • Take 1-2 per day
  • Suitable for vegans 
  • Free from common allergens

Quantity

The longer you subscribe, the more you save.

  • Skip, edit or cancel anytime
  • 5% off first 3 renewals
  • 10% off renewals 4-8
  • 15% off from renewal 9+

Delivery every

How Subscribe & Save Works

Save on the supplements you use regularly, with bigger discounts as you complete more subscription orders.

Your savings increase automatically:

  • Orders 1–3: Save 5%
  • Orders 4–8: Save 10%
  • Orders 9+: Save 15%

You're always in control:

  • Choose how often your supplements are delivered.
  • Change your delivery frequency whenever you like.
  • Skip, pause or cancel your subscription at any time.
  • Manage everything from your account.

No codes or commitments. Your discount increases automatically as you complete more subscription orders. Just choose Subscribe & Save on an eligible product and select your preferred delivery schedule.

1
American Express Apple Pay Bancontact Bizum Diners Club Discover Google Pay JCB Klarna Maestro Mastercard MB WAY PayPal Satispay Shop Pay Union Pay Visa

Free delivery available & 60-day returns

Earn up to 57 VPRO+ points per item

Added to cart
View cart

Third-Party Tested

Date • Batch # • Results

Purity results include Heavy Metals

Current Batch:

January 2026

•

2501132

Testing is carried out by Certified Labs (formerly Micro Quality Labs).

GMP Certified Facility

Our supplements are manufactured in the UK, at facilities in Oxford and the North of England, following Good Manufacturing Practice (GMP) standards.

GMP sets requirements for hygiene, production, quality control, and traceability, helping ensure supplements are consistently manufactured under controlled conditions.

Our manufacturing partners hold independently issued GMP certificates. Rather than simply asking you to take our word for it, we've made these available below for you to review.

Our UK Manufacturers' GMP Certificates

Issued by Eurofins and SGS.

Manufacturer 1

Manufacturer 2

Manufacturer names have been redacted for commercial confidentiality.

ISO Quality Managed

Vitality Pro is independently certified to ISO 9001:2015, an internationally recognised standard for quality management systems.

Maintaining this certification requires ongoing monitoring, documented checks, regular reporting and independent audits. These processes help identify areas for improvement, ensure issues are addressed, and continually strengthen the systems and controls behind our supplements. It's a commitment to quality that must be demonstrated and maintained, not simply claimed.

We believe quality should be independently verified, not simply claimed. You can view our ISO 9001:2015 certificate below.

Our ISO 9001:2015 Certificate

View Our Certificate

Ingredients

View supplement label

Capsules Per Container: 90

Amount Per Capsule Amount %NRV
L-Theanine 200mg *

Nutrient Reference Value not established*

Suitable for vegans. Contains no GMOs, common allergens, artificial colours, preservatives or flavours.

Storage & Stability

To maintain the potency and quality of your L-Theanine, store it in a cool (20°C-25°C), dry place away from light.

Quality Standards

Manufacturing: All products are made to GMP standards and have been quality-managed in accordance with the UK standard ISO 9001:2015. Third-party tested: To ensure the highest purity and maximum effectiveness, each new batch of products undergoes third-party testing by ISO 17025 accreditated Micro Quality Labs. You can view all testing certificates at www.vitality-pro.com/batch-testing.

Safety & Warnings

"Do not exceed the recommended daily dose. Food supplements should not replace a varied and balanced diet and a healthy lifestyle. If you are pregnant, breastfeeding, under 18 or taking any medication, consult a doctor before use. Stop use if adverse reactions occur.

Interactions: L-Theanine may have additive effects when combined with central nervous system (CNS) depressants such as benzodiazepines, barbiturates, and sleep medications, potentially increasing drowsiness or enhancing sedative effects. When taken with antihypertensive medications, L-Theanine may further lower blood pressure, increasing the risk of hypotension in sensitive individuals. Additionally, L-theanine can interact with stimulants, including caffeine and certain ADHD medications, by modulating or blunting their stimulating effects and potentially altering their efficacy or side effect profile. Although L-theanine is generally well-tolerated, these interactions may be more pronounced in individuals sensitive to such medications or when used in higher doses.

For further information regarding any other potential drug and supplement interactions with  L-Theanine, please see the ingredient profile on Drug Bank.* Allergy: This product does not contain any common allergens; however, it should not be used by anyone with a history of hypersensitivity to its ingredients or those taking medications that may interact with it.

Pregnancy: If pregnant, consult your health professional before using this product.

*Drug Bank is an independent website that lists potential interactions between the ingredients in L-Theanine and other medications and supplements. It may not, however, list all known possible interactions. If you are taking any medications or supplements that may interact negatively with L-Theanine, please speak with your doctor before using this product."
1

Key Studies to Consider

While individual results may vary due to personal health conditions, genetics, and lifestyle choices, we guarantee that the supplements you receive are made with ingredients of the highest purity, similar to those used in scientific studies, to ensure maximum results.

Mood

 l-theanine adjunct to sertraline for major depressive disorder – Randomised Controlled Trial

Dosage: Sertraline 100 mg per day plus L-theanine 200 mg per day, for 6 weeks

Outcome: Change in depression scores (HDRS)

Summary: Adding L-theanine to sertraline improved mood more than sertraline alone and was well tolerated.

Read more

 The effects of L-theanine supplementation on the outcomes of patients with mental disorders – Systematic Review

Dosage: 200–450 mg/day L-theanine, most commonly 400 mg/day, usually given in divided doses; used as an add-on to standard treatments.

Outcome: Changes in symptoms of mood and mental health disorders (anxiety, depression, ADHD, schizophrenia, OCD, sleep disorders).

Summary: L-theanine supplements, taken at 200–450 mg per day, may help reduce anxiety and improve mood in people with some mental health conditions, especially when used alongside standard medication. More research is needed, but L-theanine appears safe and may help support a healthy mood.

Read more

 Effects of chronic l-theanine administration in patients with major depressive disorder– Open-label Clinical Trial

Dosage: 250 mg l-theanine per day for 8 weeks

Outcome: Changes in depression, anxiety, sleep quality, and cognitive function

Summary: Taking 250 mg l-theanine daily for 8 weeks improved mood, reduced anxiety and sleep problems, and boosted thinking skills in people with depression. The supplement was well tolerated.

Read more

Sleep

 The Effects of L-Theanine Supplementation on Quality of Sleep – Systematic Review

Dosage: 50–655 mg L-theanine per day (1 day to 8 weeks); doses above 655 mg may not help and could worsen sleep

Outcome: Changes in sleep quality and related sleep measures

Summary: L-theanine at 50–655 mg daily can help improve sleep quality, reduce time to fall asleep, and support better rest, but taking more than 655 mg might be less helpful or even harmful.

Read more

L-theanine: From tea leaf to trending supplement – does the science match the hype for brain health and relaxation? – Review

Dosage: Typically 50–250 mg per day in supplements; 5.8–32 mg per 200 ml of brewed tea; some sleep studies in children used 200 mg twice daily.

Outcome: Effects on sleep quality, relaxation, and brain wave patterns.

Summary: L-theanine may help relaxation and sleep quality, mainly by reducing stress and increasing alpha brain waves, but there is not enough strong evidence from human trials to confirm clear sleep benefits.

Read more

Everything You Need To Know About L-Theanine

L-Theanine is a naturally occurring amino acid found almost exclusively in green tea (Camellia sinensis). Structurally similar to glutamate, a neurotransmitter in the brain, it has been traditionally consumed to promote relaxation and a sense of calm focus, all without causing drowsiness. Now supported by modern research L-Theanine is now widely utilised for its calming and nootropic effects.

L-Theanine crosses the blood-brain barrier, where it is able to influence specific neurochemicals and brain wave patterns. It is known to increase levels of gamma aminobutyric acid (GABA), a calming neurotransmitter, as well as serotonin and dopamine, molecules involved in mood, focus and emotional balance. By supporting GABAergic signalling, L-Theanine is shown to promote a sense of calm and relaxation, making it useful for those looking to stress and anxious feelings.

One of L-Theanine’s unique properties is its effect on brain waves. Research using EEG technology shows that L-Theanine increases alpha wave activity, which is associated with a state of “relaxed alertness”, a calm but attentive mental state that allows for increased focus and productivity. This effect on brain waves as well as L-Theanine’s ability to modulate key neurotransmitters also make it a popular nootropic with many users reporting improved attention, working memory and mental clarity.

L-Theanine is also known for its synergistic interaction with caffeine. When taken with caffeine, L-Theanine smooths out caffeine’s stimulating effects, reducing jitteriness and supporting sustained attention, reaction time and cognitive performance.

As modern life increasingly exposes us to chronic stress, distractions and overstimulation, the ability to maintain mental balance and composure becomes ever more crucial. Unlike other calming agents, L-Theanine promotes relaxation and mental clarity without sedation or impaired function. Its structure allows it to modulate the brain’s neurochemical systems and promote alpha brain wave activity, fostering a calm, focused state even during periods of heightened mental demand.

Chronic stress doesn’t just affect mood, it has far-reaching consequences for the body, especially as we age. Prolonged stress can drive up activity in the immune system, triggering low grade inflammation that has been linked to the development of age related diseases and accelerated cellular ageing. By supporting relaxation and healthy stress responses, L-Theanine may help to buffer the negative impact of chronic stress on immune function and inflammation. This calming effect may help preserve cognitive function, support cardiovascular health and reduce the risk of stress-related inflammatory conditions.

Consider the following statements. If you find one or more relatable, L-Theanine might be the support you’ve been searching for:

    • I often feel overwhelmed or anxious and want natural support for calm without feeling drowsy or sedated.
    • I struggle to unwind after a busy day or find it hard to quiet my mind when I want to relax.
    • I’m looking for a way to support focus, clarity and mental performance, especially during work, studying or creative tasks.
    • I notice that caffeine sometimes makes me feel jittery, wired or restless, and I’d like something to smooth out those effects.
    • I want to support my mood and emotional balance, especially during times of stress or when life feels hectic.
    • I’m interested in nootropic supplements that can help enhance alpha brain wave activity for a calm-yet-alert state of mind.
    • My sleep quality is affected by stress, and I’d like gentle support to relax before bed without causing morning grogginess.
    • My healthcare professional recommended L-Theanine as part of my wellness routine or to complement other therapies.
Made to GMP Standards
ISO 9001 Certified UK Company
Independent Testing for Purity

Transparent Testing

Every batch is independently tested for identity, potency, contaminants, heavy metals, and microbial markers.

View all product tests

L-Theanine test results

Date • Batch # • Results

Purity results include Heavy Metals

Current Batch:

January 2026

•

2501132

Testing is carried out by Certified Labs (formerly Micro Quality Labs).

Frequently Asked Questions

L-Theanine promotes relaxation without sedation, helping you stay calm and focused at the same time. It works by supporting neurotransmitters like GABA, serotonin, and dopamine, which regulate mood and mental clarity.

L-Theanine increases alpha brain wave activity, which is linked to a calm yet alert state. This makes it popular for studying, work, and creative tasks where focus and composure are important.

When taken with caffeine, L-Theanine helps smooth out overstimulation, reducing jitters and supporting sustained attention. Many people find this combination boosts productivity without the crash.

Unlike most calming supplements, L-Theanine doesn’t cause drowsiness. Instead it works to promote relaxation while keeping your mind alert and engaged.

L-Theanine is generally well-tolerated at recommended doses. It can be taken daily for ongoing stress and focus support.

Certainty of purity.

We are committed to the following quality controls to ensure consistency, reliability, and transparency in every product. Our goal is to raise industry standards and give you clear reasons to trust what you’re taking.
  • GMP Certified Facility

    All products are made to cGMP (current Good Manufacturing Practice) standards, the global benchmark for supplement quality. GMP standards ensure strict control over how our supplements are produced, covering everything from cleanliness to documentation and quality control. Every step is monitored to guarantee consistency and safety in every batch, so you receive the same high-quality product every time.

  • Third-Party Tested

    At the foundation of what we offer is certainty of product quality through consistent third-party testing, specifically for purity.

  • ISO Quality Managed

    ISO 9001:2015 standards are an internationally recognised framework for effective quality management. This accreditation means we follow a structured system of continuous improvement, always refining our processes to enhance product consistency and customer satisfaction. ISO accreditation ensures that every aspect of our operations, from production to customer service, is optimised. This means better oversight, reduced risk of errors, and a clear focus on delivering consistent results.

  • Transparency

    We believe you should have full clarity about what you’re putting in your body and the steps we take to ensure the quality of our supplements. That’s why we are transparent and open about every part of our process.

  • GMP Certified Facility

    Droplets

    Our supplements are manufactured in the UK, at facilities in Oxford and the North of England, following Good Manufacturing Practice (GMP) standards.

    GMP sets requirements for hygiene, production, quality control, and traceability, helping ensure supplements are consistently manufactured under controlled conditions.

    Our manufacturing partners hold independently issued GMP certificates. Rather than simply asking you to take our word for it, we've made these available below for you to review.

    Our UK Manufacturers' GMP Certificates

    Issued by Eurofins and SGS.

    Manufacturer 1

    Manufacturer 2

    Manufacturer names have been redacted for commercial confidentiality.

    Third-Party Tested

    Date • Batch # • Results

    Purity results include Heavy Metals

    Current Batch:

    January 2026

    •

    2501132

    Testing is carried out by Certified Labs (formerly Micro Quality Labs).

    ISO Quality Managed

    Vitality Pro is independently certified to ISO 9001:2015, an internationally recognised standard for quality management systems.

    Maintaining this certification requires ongoing monitoring, documented checks, regular reporting and independent audits. These processes help identify areas for improvement, ensure issues are addressed, and continually strengthen the systems and controls behind our supplements. It's a commitment to quality that must be demonstrated and maintained, not simply claimed.

    We believe quality should be independently verified, not simply claimed. You can view our ISO 9001:2015 certificate below.

    Our ISO 9001:2015 Certificate

    View Our Certificate

    Transparency

    We believe you should have full clarity about what you’re putting in your body and the steps we take to ensure the quality of our supplements. That’s why we are transparent and open about every part of our process.

    Transparency means we share all the details that matter—how our products are made, tested, and verified. From publishing third-party test results to offering clear ingredient labels, we provide you with the information you need to make informed choices about your supplements. Nothing is hidden, and every product comes with full accountability.

    In a world where many supplement companies keep you in the dark, we believe you deserve complete honesty. Being transparent allows you to trust that you’re getting exactly what you expect—pure, tested supplements without hidden risks. It’s about empowering you to make confident decisions and focus on your health journey without second-guessing the products you take.

    Trusted By Professionals & Industry Experts

  • Dr. Ahmet Ozyigit

    Dr. Ahmet Ozyigit, MD, MSc, PgDip

    Head of Clinical Research at Elite Hospital

    "As a physician, purity of a product is my main concern when it comes to recommending supplements for my patients. The line of products offered by vitalityPRO is not only in line with the latest research in anti-ageing, but is also third-party tested and purity checked, which is of utmost importance for receiving maximal benefits from treatment."

  • Simon Jones

    Simon Jones, MBChB, MRCP, MSc

    Lead Academy Doctor at a Premier League Football Club

    "Vitality Pro is a fantastic company, clearly striving to achieve the highest standard and reliability of supplements on the market. Their range really is at the cutting edge of longevity supplements, and the independent third-party testing is incredibly reassuring in terms of quality."

  • Casey Vincent

    Casey Vincent, Two-Time Olympian

    Australian Olympics Sprinter 2000-2004

    “I have done my research on vitalityPRO products and without a doubt have found their supplements to be far superior to the competition”

  • Tony Pemberton

    Tony Pemberton, FdENG

    Certified Epigenetic Coach

    "I'm very discerning of either overpriced supplements or poor quality ingredients, but I have to say Vitality PRO products are superb while still being great value. I use them myself for improving ageing biomarkers, and I am happy to recommend them to both my clients and viewership."

  • Kim Forteza

    Kim Forteza, MSc, PGCert, TPU, CNS

    Elite Athlete Coach

    "I have found Vitality Pro to have a great commitment to the client. They generate trust due to their service, presentation, formulation, technical explanations, and third-party analysis of each of their products. It is a brand that I always recommend when looking for excellence in a product, both for my athletes and for all people looking for supplementation with guarantees."

  • Emel Gunay

    Emel Gunay, DipCNM, mBANT, mIFM

    Nutritional Therapist and Research Manager at OMNOS

    "V​itality-PRO offers excellent customer support, knowledgeable staff, and great value for money on high-quality supplements. ​​The products are of outstanding quality, and I appreciate their dedication to quality and transparency, which ensures safety and compliance for my clients. I​ can highly recommend ​them."

  • Jonny Hirtenstein

    Jonny Hirtenstein, MChiro, DC, ACN

    Founder and Lead Chiropractor at Foundation For Life

    ”As a clinician I appreciate Vitality Pro's passion for producing products that are designed to deliver great results and knowing that they independently test all the batches of the products is very reassuring. Ultimately I know that they care about everything they do, and are striving to produce some of the most cutting edge products on the market.”

  • Dr. Zain Khan

    Dr. Zain Khan, MBBS

    British Medical Association Executive Council Member

    “A professional supplement company who aim to be transparent, innovative and trustworthy. They invest time and money into conducting independent lab tests to verify the purity and quality of their products, ensuring that you receive precisely what you pay for.”

  •  Dr James Hetfield

    Dr James Hetfield, Lead Doctor

    Lead Doctor

    Specialise in being a doctor

  • Andy Smith

    Andy Smith, PEMF Expert

    CEO of NewMed & Founder of CELLER8

    "Vitality Pro offers an impressive range of high-quality supplements, and their Magnesium Glycinate is my personal favourite. I love stacking it with my daily PEMF sessions as they complement each other perfectly for enhanced wellness. I trust Vitality Pro for reliable vitamins and supplements, and I’m always happy to recommend them to my customers!"

  • Loading

    Remembered your essentials?

    Subtotal
    Checkout Securely

    Delivery Information

    Customs Fees: There may be customs to pay depending on your country's local requirements. We will do what we can to avoid or minimise these as much as possible. If import charges are required, you will receive an email or text with customs clearance and payment instructions.

    HIGH COST DUE TO INCREASED RISK CHARGE ADDED BY DHL

    Free Delivery: Available on orders over $600 USD.

    Cost: $69 for orders under $600.

    Service: DHL Express

    Timeframe: Expected within 5-10 business days.

    Tracking: Your tracking number will be included in your confirmation email once your parcel has been shipped.

    *Delivery to remote areas may take longer.

    No Customs Fees: Pay only the price shown at checkout. We guarantee no additional charges.* We are paying the new customs charges for you.

    Delivery Options:

    DPD International
    Delivery Time: 5-10 business days**
    Cost: $13
    Free on orders over $200

    DHL Express
    Delivery Time: 1-4 business days*
    Cost: $30
    Free on orders over $400

    Tracking: Your tracking number will be provided in your confirmation email once your parcel has been shipped.

    *Customs guarantee: While customs charges are not expected, we will fully refund any unexpected charges and work directly with the courier to resolve the issue.

    **The US is currently experiencing delays due to recent changes in import customs policy. We apologise, but your parcel delivery may be delayed by a few days. Delivery to remote areas may also take longer.

    Customs Fees: Customs charges may apply. We apologise for any inconvenience due to changes following Brexit. If import charges are required, you will receive an email or text with customs clearance and payment instructions.

    Delivery Options:

    Local Mail
    Delivery Time: 7 -14 business days*
    Cost: 12 €
    Free on orders over 120 € for local mail or 240 € for DHL Express.

    DHL Express
    Delivery Time: 1-4 business days*
    Cost: 24 €
    Free on orders over 240 €

    Tracking: Your tracking number will be provided in your confirmation email once your parcel has been shipped.

    *Delivery to remote areas may take longer.

    Customs Fees: There may be customs to pay depending on your country’s local requirements. We will do what we can to avoid or minimise these as much as possible. If import charges are required, you will receive an email or text with customs clearance and payment instructions.

    Free Delivery: Available on orders over $300 USD.

    Cost: $39 for orders under $300.

    Service: DHL Express

    Timeframe: Expected within 3-7 business days.

    Tracking: Your tracking number will be included in your confirmation email once your parcel has been shipped.

    *Delivery to remote areas may take longer.

    Already ordered?

    Check your order status

    Money Back Guarantee

    60 Day Satisfaction Guarantee

    We want you to feel confident trying our products. If you're not satisfied for any reason, you can return your product within 60 days of receiving it for a full refund.

    This includes if you've changed your mind, haven't noticed the difference you hoped for, experienced side effects, or simply decided the product isn't right for you.

    How to claim the guarantee

    • Email returns@vitality-pro.com with your order number, which you'll find in your order confirmation email.
    • We'll send you the address to return your product to. Please include a note with your order number inside the parcel so we can identify your return.
    • Once your return is received, we'll process your refund within 7 days.

    Return shipping costs: You'll need to arrange and pay for return shipping unless the product arrived faulty or damaged. All returns are sent to our UK return address. If you're ordering from outside the UK, please keep in mind that international return shipping can be expensive.

    Multiple bottles or larger quantities: If you buy multiple bottles or a larger quantity of the same product in a single order, the guarantee covers the use of one bottle, or the smallest individual size supplied. Any additional unopened units must be returned to receive a refund.

    For example, if you order 180 capsules and receive 2 × 90-capsule bottles, you can open and use one 90-capsule bottle. The second bottle must be returned.

    The 60-Day Satisfaction Guarantee does not apply to our 100g NMN or 100g Resveratrol products, as we offer smaller 20g and 30g options to give you the opportunity to try the product before committing to a larger supply.

    Get Support

    Call us

    +44 (0) 1202 082 280

    Monday to Friday
    10:00am to 4:00pm (UK time)

    Email us

    We aim to respond within 48 business hours

    Send us a message

    Rewards

    Get more from every order

    Join vPro+ Rewards for free and earn points when you shop. Turn your points into money off future orders, and earn extra rewards when you introduce a friend.

    • Earn as you shop - collect points on eligible purchases.

    • Enjoy future savings - redeem your points for money off.

    • Share the rewards - give friends a discount and get rewarded when they shop.

    • Keep track easily - view your points and available rewards in your account.

    You can join at checkout while placing your order. Simply create an account, or sign in if you already have one.

    Added to cart
    View cart