Best Quality L Theanine in 2022

L-theanine is an amino acid that is naturally found in green tea. It is a popular supplement because it is known to promote relaxation without causing drowsiness. Some research has suggested that L-theanine may also help to improve cognitive function and memory.

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Things to Consider:

When it comes to finding the best quality l-theanine, there are a few things you will want to consider before making your purchase. First, you will want to make sure that you are buying from a reputable source. There are many online retailers that sell l-theanine, but not all of them are created equal. Make sure you do your research and only buy from a trusted source.

Second, you will want to make sure you are getting a pure product. Many companies add fillers and other ingredients to their l-theanine supplements, which can decrease the overall quality. Stick with a company that only uses pure l-theanine in their products.

Finally, you will want to consider the price. L-theanine is not a cheap supplement, but you should be able to find a quality product at a reasonable price. Shop around and compare prices before making your final decision.

How We Pick & Test:

We use a number of different methods to pick and test the best quality l theanine. One of the most important methods is to test the purity of the compound. We also test the potency and efficacy of the compound to make sure it is up to the highest standards.

Top 10 Best Quality L Theanine

Details of Best Quality L Theanine

Bestseller No. 1
Quality of Life Pure Balance Serotonin Premium 5-HTP & Stress Supplement–Helps Boost Serotonin & Cortisol Levels–Mood & Sleep–Includes Relora, Rhodiola, Vitamin D3 & L-Theanine–90 Capsules
  • SUPPORTS MOOD, STRESS & SLEEP: Our PureBalance Serotonin supplement is made with natural mood enhancing herbs to help reduce stress, support weight management, promote relaxation, and support a positive mood, and help you get more restful sleep.
  • BALANCES SEROTONIN AND CORTISOL LEVELS: PureBalance Serotonin provides the raw material your body needs to make serotonin to bring you one step closer to a healthier you.
  • FROM NATURALLY SOURCED INGREDIENTS: Our formula is made with a proprietary blend of 5-HTP(L-5 Hydroxy- tryptophan), Rhodiola root extract, Vitamin D3 (cholecalciferol), Relora, and L-theanine to boost the effects of our natural stress support.
  • MADE IN THE UNITED STATES: All Quality of Life supplements are manufactured in the USA with globally sourced ingredients in an FDA registered and NSF certified facility that adheres to Good Manufacturing Practices (GMP) to ensure the highest quality of production. Our vegetarian formulated capsules are vegan, gluten free, dairy free, and preservative free.
Bestseller No. 2
NOW Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 120 Veg Capsules
  • STRESS MANAGEMENT*/PROMOTES RELAXATION*: Promotes relaxation without the drowsiness or negative side effects associated with other calming agents.*
  • Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
  • HEALTHY VASCULAR FUNCTION*/WITH INOSITOL: Formulation includes inositol, a member of the B-vitamin family that is essential for brain and nervous system health.*
  • GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
Bestseller No. 3
VitaDirect Premium Pure L-Theanine Capsules 250 mg (Theanine), 120 Vegetarian Capsules, Non-GMO, Gluten Free
  • Premium L-Theanine Capsules Providing A High Quality Dietary Supplement.
  • Gluten Free, High Quality Capsules, Third Party Tested For Quality.
  • Formulated and Made For an Easy To Swallow Capsule.
  • All VitaDirect Products Are Made In GMP Compliant and FDA Regulated Facility. Insuring The Best Practices.
  • 100% Satisfaction Guaranteed - If you're unsure about your purchase and don't see results, we'll refund your money for up to 30 days from purchase.
Bestseller No. 4
Nature Made Sleep Longer, Melatonin 10mg Time Release Tri-Layer Tablets, Helps Improve Sleep Quality, Fall Asleep Faster, Stay Asleep Longer, L-Theanine and GABA to Help Calm Your Mind, 35 Tablets
  • SLEEP AID FOR ADULTS: This 100% drug-free, non-habit forming naturally acting sleep aid combines Melatonin 10mg with our proprietary blend of L-theanine and GABA to help you calm your mind, fall asleep faster, and stay asleep longer.(1)
  • TRIPLE ACTION, TIME RELEASE MELATONIN TABLETS: Uses tri-layer technology to provide just the right amount of Melatonin at the right time, helping you fall asleep faster and sleep through the night.
  • L-THEANINE AND CALM MIND BLEND: Our proprietary blend combines L theanine, which acts on alpha brain wave activity to help relax the mind, and GABA which acts as a neurotransmitter to help support a calm and relaxed mental state.
  • 35-DAY SUPPLY, 1 TABLET BEFORE BEDTIME: Contains 35 tablets, 1 per day. Adults take 1 tablet one hour before bedtime with water. Do not exceed 1 tablet daily.
  • HIGH QUALITY INGREDIENTS: Made from carefully selected ingredients under strict manufacturing practices and guaranteed to meet our high quality standards. No synthetic dyes. No artificial flavors. No preservatives. Gluten free. Non-habit forming.
Bestseller No. 5
Neuro Gum | Nootropic Energy Caffeine Gum | 40mg Caffeine + 60mg L-theanine + B Vitamins for Energy and Focus | Sugar Free + Vegan + Keto | Caffeine Supplement for Adults Mint Flavor (54 Gums)
  • ENERGY + FOCUS + CLARITY: Neuro Gum caffeine gum’s quick release formulation contains the ideal balance of nootropics designed to give you a clean and balanced boost.
  • QUICK EFFECTS: Our patented cold compression system maximizes the delivery and bioavailability of active ingredients. Get clean energy faster than drinking coffee or energy drinks with our caffeine mints and gum.
  • NO SUGAR CRASH: Unlike other energy supplements, we only use high quality GRAS ingredients to get you in the zone with clean energy without the sugar crash.
  • PERFECT ON THE GO: With 9 pieces of optimum energy that fit right into your pocket, you’ll be ready to conquer the world with fresh breath and a fresh mind.
  • ASPARTAME FREE + SUGAR FREE + NON GMO + GLUTEN FREE: Neuro Gum Energy and Focus increases focus and productivity without ingesting artificial forms of energy in drinks or a handful of pills. *Neuro Inc. is not affiliated with or endorsed by NeuroBrands LLC.
Bestseller No. 6
NOW Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 60 Veg Capsules
  • STRESS MANAGEMENT*/PROMOTES RELAXATION*: Promotes relaxation without the drowsiness or negative side effects associated with other calming agents.*
  • HEALTHY VASCULAR FUNCTION*/WITH INOSITOL: Formulation includes inositol, a member of the B-vitamin family that is essential for brain and nervous system health.*
  • GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).Dairy free
  • Packaged in the USA by a family owned and operated company since 1968.
SaleBestseller No. 7
Suntheanine® L-Theanine 200mg (Double-Strength) in Cold-Pressed Organic Coconut Oil; Non-GMO & Gluten Free - 60 Liquid Softgels
  • ALERT & CALM: L-Theanine is an amino acid commonly found in green tea and is believed to help with relaxation. Suntheanine is patented, researched, and clinically proven to promote an alert state of relaxation and focus without any accompanying drowsiness. Get focused so you feel ready to take on the day!
  • PREMIUM QUALITY: Sports Research is proud to offer products using only the best ingredients available so that you can have total peace of mind in the supplements that you are taking. Our L-Theanine 200mg softgel capsules are certified non-GMO and free of soy, gluten, artificial colors, Hexane, Stearates, and Titanium Dioxide.
  • MANUFACTURED IN THE USA: Our products are made in cGMP compliant facilities in the United States, using only the best ingredients from domestic & international origins. For us, it's all about quality control - so you can have confidence in your dietary supplements.
  • EASY TO USE: As a dietary supplement, simply take one (1) easy to swallow liquid softgel daily with or without food or as directed by your qualified healthcare professional. Promoting an increase in Alpha brain waves and a decrease in Beta brain waves, you'll find your spark and get the boost you need with none of the sugar or unwelcome side effects from energy drinks or energy supplements.
  • THE SPORTS RESEARCH DIFFERENCE: Created in 1980, Sports Research is a privately-owned business born from a passion for fitness, wellness, and healing. Our goal is to help people live their best lives through real, research-backed ingredients created for every body — inside and out. We're fully dedicated to sourcing the highest quality products from around the world, backed by third party testing. We all deserve the best in our quest for healthy living. Our mission is to give you just that.
SaleBestseller No. 8
L Theanine 400mg | 120 Capsules | Non-GMO & Gluten Free | by Horbaach
  • AMINO SUPPORT: L-Theanine is a naturally-occurring Amino Acid found in widely touted Green Tea
  • DYNAMIC SUPPLEMENT: Contains 400 mg of L-Theanine per serving in convenient Quick-Release capsules
  • PROFESSIONAL SOURCING: Our ingredients are carefully selected and tested to ensure strong purity
  • HORBAACH MANUFACTURERS: Laboratory Tested, Trusted Ingredients, Superior Quality, 100% Guaranteed!
  • NATURALLY FREE OF: Gluten, Wheat, Yeast, Milk, Lactose, Soy, Artificial Color & Flavoring & NON-GMO
Bestseller No. 9
Neuriva Sleep Plus with 4-in-1 Benefits - Clinically Tested Ashwagandha, L-Theanine & Melatonin - Reduce Stress, Fall Asleep Faster, Improve Sleep Quality, Wake Up Refreshed*, 58ct Capsules
  • BACKED BY SCIENCE: We started as a supplement to fuel brain health, but now we're on a mission to help brains become the best they can be. We want brains to realize their full potential and it all comes down to getting a good night's sleep.
  • WHAT DREAM'S ARE MADE OF: To function at your best, getting a good night's sleep is a no brainer since it affects your energy, attitude, and mood. That's why we created NEW Neuriva Sleep Plus, to help you fall asleep faster and improve your sleep quality, so you can wake up feeling refreshed.
  • NATURAL SLEEP AID: Neuriva Sleep Plus is a sleep support supplement with clinically tested Shoden Ashwagandha, L-Theanine and Melatonin because we believe sleep marks the beginning of the day, not the end. Try Neuriva Sleep Plus today and experience the hype behind Better Sleep For Better Days
  • ASHWAGANDHA: This plant extract is clinically tested to support restorative sleep and help improve sleep quality, so you can feel refreshed when you wake up.
  • L-THANINE: This amino acid, commonly found in green tea, helps you relax from everyday stress.
SaleBestseller No. 10
L-Theanine 400mg | 400 Capsules | Value Size | High Potency | Non-GMO & Gluten Free | by Horbaach
  • AMINO SUPPORT: L-Theanine is a naturally-occurring Amino Acid found in widely touted Green Tea
  • DYNAMIC SUPPLEMENT: Contains 400 mg of L-Theanine per serving in convenient Quick-Release capsules
  • PROFESSIONAL SOURCING: Our ingredients are carefully selected and tested to ensure strong purity
  • HORBAACH MANUFACTURERS: Laboratory Tested, Trusted Ingredients, Superior Quality, 100% Guaranteed!
  • NATURALLY FREE OF: Gluten, Wheat, Yeast, Milk, Lactose, Soy, Artificial Color & Flavoring & NON-GMO

Benefits of Best Quality L Theanine:

It’s no secret that the best quality l theanine comes with a number of benefits and features that make it a popular choice among those looking to improve their health and well-being. Here are just a few of the many advantages that this natural compound has to offer:

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1. L theanine has been shown to promote relaxation and reduce stress levels.

2. It can help improve sleep quality and duration.

3. L theanine has neuroprotective effects and can help improve cognitive function.

4. It is a safe and non-toxic compound with few side effects.

5. L theanine is relatively affordable and easy to find.

These are just a few of the many reasons why l theanine is such a popular choice for those looking to improve their health. If you’re looking for a safe and effective way to improve your overall well-being, then l theanine may be worth considering.


There is no set size for the best quality l theanine, as it depends on the specific product and brand. However, as a general rule, the higher the quality, the more potent and effective the l theanine will be. There are many different brands of l theanine on the market, so it is important to do your research to find the best one for your needs.


L-theanine is an effective amino acid that is commonly found in green tea. This amino acid is known to provide a number of health benefits, including improved brain function and reduced stress levels. L-theanine is also known for its ability to improve the quality of sleep.

Ease of Use:

Best quality L theanine is one of the most popular supplements on the market. It is simple to use and can be taken by mouth or added to food or drinks. Best quality L theanine is also one of the most effective supplements for relaxation and anxiety relief.

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Best quality l theanine is very convenient because it is a dietary supplement that can be taken orally. It is also easy to find and purchase online or in health food stores.


Some studies suggest that L-theanine is more durable than other supplements. It is also thought to be more effective when taken in larger doses. Some people believe that L-theanine is the most effective when taken in conjunction with other supplements, such as green tea extract.

Frequently Ask Questions:

Only an internal examination can tell if you need l theanine best quality pills.

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The best quality l theanine will provide you with a great many benefits. It can improve your mood, memory, and focus. Additionally, it can help reduce stress and anxiety levels. If you are looking for a supplement to improve your overall well-being, l theanine is an excellent option.

Last update on 2022-10-02 / Affiliate links / Images from Amazon Product Advertising API.

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