20 Best Doctors Suntheanine [2024]

Are you looking for the best doctors suntheanine? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling doctors suntheanine.

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1 Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free,... Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free,...
2 Sports Research Double Strength ‘Suntheanine’ L-Theanine with Organic Coconut Oil - Promotes... Sports Research Double Strength ‘Suntheanine’ L-Theanine with Organic Coconut Oil - Promotes...
3 Stress-Relax Suntheanine L-Theanine 125 mg by Natural Factors, Non-Drowsy Stress Support for Mental... Stress-Relax Suntheanine L-Theanine 125 mg by Natural Factors, Non-Drowsy Stress Support for...
4 Stress-Relax Chewable Suntheanine L-Theanine 100 mg by Natural Factors, Non-Drowsy Stress Support... Stress-Relax Chewable Suntheanine L-Theanine 100 mg by Natural Factors, Non-Drowsy Stress Support...
5 Integrative Therapeutics L-Theanine 200 mg - Suntheanine Brand L-Theanine - Promotes a Relaxed State... Integrative Therapeutics L-Theanine 200 mg - Suntheanine Brand L-Theanine - Promotes a Relaxed...
6 L-Theanine 200mg Super Value Size - 365 Vegetarian Capsules L-Theanine 200mg Super Value Size - 365 Vegetarian Capsules
7 NOW Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 120 Veg Capsules NOW Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 120 Veg Capsules
8 Nature's Way L-Theanine, Suntheanine Brand, Patented Amino Acid, 200 mg Potency, 180 Capsules Nature's Way L-Theanine, Suntheanine Brand, Patented Amino Acid, 200 mg Potency, 180 Capsules
9 Doctor’s Recipes L-Arginine for Men & Women 90 Caps, AAKG, L-Citrulline, Beet Root & Panax... Doctor’s Recipes L-Arginine for Men & Women 90 Caps, AAKG, L-Citrulline, Beet Root & Panax...
10 Swanson Amino Acid Suntheanine L-Theanine 100 Milligrams 60 Veg Capsules Swanson Amino Acid Suntheanine L-Theanine 100 Milligrams 60 Veg Capsules
11 Jarrow Formulas Theanine 200 mg, Neurologically Active Amino Acid, Found in Green Tea, Promotes... Jarrow Formulas Theanine 200 mg, Neurologically Active Amino Acid, Found in Green Tea, Promotes...
12 Organic Ashwagandha 2,100 mg - 100 Vegan Capsules Pure Organic Ashwagandha Powder and Root Extract -... Organic Ashwagandha 2,100 mg - 100 Vegan Capsules Pure Organic Ashwagandha Powder and Root Extract...
13 Stress-Relax Tranquil Sleep Extra Strength by Natural Factors, Sleep Aid with Suntheanine... Stress-Relax Tranquil Sleep Extra Strength by Natural Factors, Sleep Aid with Suntheanine...
14 Doctor's Best Benfotiamine 150 + Alpha-Lipoic Acid 300, Non-GMO, Vegan, Gluten Free, Promotes... Doctor's Best Benfotiamine 150 + Alpha-Lipoic Acid 300, Non-GMO, Vegan, Gluten Free, Promotes...
15 Healthy Origins L-Theanine (AlphaWave) 100 mg, 180 Veggie Caps Healthy Origins L-Theanine (AlphaWave) 100 mg, 180 Veggie Caps
16 Natures Way, L Theanine, 60 Veg Capsules Natures Way, L Theanine, 60 Veg Capsules
17 Doctor's Best Quercetin Bromelain, Immunity Support, Heart, Joint & Healthy Respiratory System,... Doctor's Best Quercetin Bromelain, Immunity Support, Heart, Joint & Healthy Respiratory System,...
18 Doctor's Best Benfotiamine, Non-GMO, Vegan, Gluten Free, Soy Free, Helps Maintain Blood Sugar... Doctor's Best Benfotiamine, Non-GMO, Vegan, Gluten Free, Soy Free, Helps Maintain Blood Sugar...
19 Doctor's Best PepZin GI, Zinc-L-Carnosine Complex, Non-GMO, Vegan, Gluten Free, Soy Free, Digestive... Doctor's Best PepZin GI, Zinc-L-Carnosine Complex, Non-GMO, Vegan, Gluten Free, Soy Free,...
20 Doctor's Best L-arginine HCL Powder, Non-GMO, Vegan, Gluten Free, Soy Free, Helps Promote Muscle... Doctor's Best L-arginine HCL Powder, Non-GMO, Vegan, Gluten Free, Soy Free, Helps Promote Muscle...
Bestseller No. 1
Doctor's Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free,...
  • Doctor’s Best L-Theanine contains Suntheanine, a pure form of L-Theanine on the market produced via a patented process that mimics the natural...
  • CALMNESS – L-Theanine supports relaxation and a sense of calm without causing drowsiness or loss of focus. This amino acid found naturally in tea...
  • SUPPORTS BRAIN HEALTH - L-Theanine is a powerful Amino Acid that enhances cognitive performance and alertness. L-Theanine may help improve quality of...
  • SUNTHEANINE - L-theanine is an agent that is used for nervousness and tension by supporting mental tranquility. Suntheanine may normalize the body’s...
  • During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when...
SaleBestseller No. 2
Sports Research Double Strength ‘Suntheanine’ L-Theanine with Organic Coconut Oil - Promotes...
  • ALERT & CALM: L-Theanine is an amino acid commonly found in green tea and is believed to help with relaxation. Suntheanine is patented, researched,...
  • 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...
  • Our products are made in cGMP compliant facilities in the United States, using only the best ingredients from domestic & international origins. For...
  • 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...
  • THE SPORTS RESEARCH DIFFERENCE: Created in 1980, Sports Research is a privately-owned business born from a passion for fitness, wellness, and healing....
Bestseller No. 3
Stress-Relax Suntheanine L-Theanine 125 mg by Natural Factors, Non-Drowsy Stress Support for Mental...
  • NON-DROWSY PEACE OF MIND: Feel calm and stay sharp with help from 125 mg of natural L-theanine; Fast-acting support for physical and mental relaxation
  • CALM AND FOCUSED: Promotes calmness and helps stimulate an overall sense of relaxation; Perfect for working through daytime stress and relaxing at...
  • NATURAL INGREDIENTS: Suntheanine is a pure source of L-Theanine, an amino acid found in green tea and processed for maximum calming effects
  • TWO CAPSULES: Take 1-2 times daily; Vegan, non-GMO, non-habit-forming and free of gluten and soy
  • THIRD-PARTY CERTIFIED: Independently tested for GMOs and over 700 contaminants using advanced technology such as mass spectrometry to ensure purity...
Bestseller No. 4
Stress-Relax Chewable Suntheanine L-Theanine 100 mg by Natural Factors, Non-Drowsy Stress Support...
  • Non-drowsy peace of mind: Feel calm and stay sharp with help from 100 mg of natural L-theanine in a delicious chewable; Fast-acting support for...
  • Calm and focused: Promotes calmness and helps stimulate an overall sense of relaxation; Perfect for working through daytime stress and relaxing at...
  • Natural ingredients: Suntheanine is a pure source of L-Theanine, an amino acid found in green tea and processed for maximum calming effects
  • Two tablets: Take up to 3 times daily; Vegan, non-GMO, non-habit forming and free of gluten and soy; Tropical flavored
  • Third-party certified: Independently tested for GMOs and over 700 contaminants using advanced technology such as mass spectrometry to ensure purity...
Bestseller No. 5
Integrative Therapeutics L-Theanine 200 mg - Suntheanine Brand L-Theanine - Promotes a Relaxed State...
  • L-Theanine is an amino acid that supports a relaxed state without diminishing daytime alertness*
  • Suntheanine L-Theanine is an amino acid that helps support relaxation and a healthy stress response*
  • Clinically studied, L-theanine can support a healthy stress response*
  • Soy free, dairy free. No wheat, corn, or artificial colors, flavors, or preservatives
SaleBestseller No. 6
L-Theanine 200mg Super Value Size - 365 Vegetarian Capsules
  • SUPER VALUE SIZE - 365 Vegetarian Capsules
  • L-Theanine 200mg may promote relaxation without drowsiness - May restore a sense of calm
  • Found naturally in green tea
  • Natural Ingredients - Good Health from the Source!
  • Made in the USA - GMP NSF Certified Facility - Kosher Certified
Bestseller No. 7
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...
  • HEALTHY VASCULAR FUNCTION*/WITH INOSITOL: Formulation includes inositol, a member of the B-vitamin family that is essential for brain and nervous...
  • CLASSIFICATIONS/CERTIFICATIONS: Vegan, Kosher, Non-GMO
  • GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our...
Bestseller No. 8
Nature's Way L-Theanine, Suntheanine Brand, Patented Amino Acid, 200 mg Potency, 180 Capsules
  • Promotes relaxation.*
  • Contains the patented form of L-theanine, Suntheanine.
  • Contains 100 mg L-theanine per serving.
  • Helps you get the rest and relaxation you need.*
  • Gluten-free and vegetarian. No salt, yeast-derived ingredients, corn, wheat, soy, dairy, or artificial colors, flavors, or preservatives.
Bestseller No. 9
Doctor’s Recipes L-Arginine for Men & Women 90 Caps, AAKG, L-Citrulline, Beet Root & Panax...
  • High Potency Performance Formula: Our perfect combination of L-Arginine, Arginine AKG, L-Citrulline Malate, Organic Beet Root & Panax Ginseng at...
  • Synergistic NO Booster Stacks: L-arginine, Arginine AKG, L-Citrulline Malate and Organic Beet Root work synergistically to boost NO levels.* Higher...
  • Proudly Made in the USA: Our advanced strength formula is loaded with the highest grade & naturally sourced ingredients in a GMP certified facility in...
  • Personal Choices, Professional Solutions: At Doctor’s Recipes, we believe the products and services should be done professionally and with...
  • Pure & Natural: We have everything you need and nothing you don’t, and you will always know what you’re putting in your body. The name of this...
SaleBestseller No. 10
Swanson Amino Acid Suntheanine L-Theanine 100 Milligrams 60 Veg Capsules
  • Supports balanced mental health and emotional well-being

  • Maintains a feeling of calm while remaining alert

  • Helps ease nervous tension

  • Vegetarian
  • Per GMP guidelines set forth by the FDA, most products are formulated for 24 months from the date of manufacture. Liquids and probiotics are...
SaleBestseller No. 11
Jarrow Formulas Theanine 200 mg, Neurologically Active Amino Acid, Found in Green Tea, Promotes...
  • Neurologically Active Amino Acid: Theanine is a unique amino acid found almost exclusively in green tea that exerts beneficial effects on brain...
  • Relaxation and Pleasure: Theanine induces relaxation without causing drowsiness, as measured by increased generation of alpha-waves; Theanine may...
  • Veggie Caps: Take one veggie capsule per day with water or juice on an empty stomach or as directed by your qualified healthcare professional; This...
  • Superior Nutrition and Formulation: The goal of Jarrow Formulas is to promote optimal health with high-quality, effective, affordable, and superior...
Bestseller No. 12
Organic Ashwagandha 2,100 mg - 100 Vegan Capsules Pure Organic Ashwagandha Powder and Root Extract -...
  • ✔️SUPERIOR POTENCY 2100 MG our organic ashwagandha root delivers 2100 mg per serving with 100 vegan capsules making it the most potent formula...
  • ✔️ORGANIC ASHWAGANDHA Made with pure organic ashwagandha powder root & ashwagandha root extract with black pepper extract to help maximize...
  • ✔️NATURAL AYURVEDA STRESS RELIEF superior quality we take pride in providing you a pure organic ashwagandha which does NOT CONTAIN fillers...
  • ✔️Manufactured in a FDA registered facility in accordance with Good Manufacturing Practices GMP
  • 100% SATISFACTION GUARANTEE Feel results or your money back no questions asked
Bestseller No. 13
Stress-Relax Tranquil Sleep Extra Strength by Natural Factors, Sleep Aid with Suntheanine...
  • A good night' s rest: Our advanced, non-habit-forming blend of natural ingredients helps prepare you for a refreshing and rejuvenating sleep without...
  • High potency sleep aid: Contains Suntheanine L-Theanine (200 mg), 5-HTP (15 mg) and melatonin (6 mg) to support every stage of slumber
  • One tablet: Taken at bedtime or as directed by a health professional; Vegan, non-GMO, non-habit forming and free of gluten and soy
  • Third-party certified: Independently tested for GMOs and over 700 contaminants using advanced technology such as mass spectrometry to ensure purity...
SaleBestseller No. 14
Doctor's Best Benfotiamine 150 + Alpha-Lipoic Acid 300, Non-GMO, Vegan, Gluten Free, Promotes...
  • DOCTOR'S BEST BENFOTIAMINE 150 + ALPHA-LIPOIC ACID 300 - a winning combination that helps support healthy aging and maintains healthy cells in the...
  • BENFOTIAMINE - is a fat-soluble form and highly bioavailable derivative of thiamin (Vitamin B1) that helps support the circulatory and nervous...
  • ALPHA-LIPOIC ACID - Alpha-Lipoic acid (ALA) is a key factor in the cellular process that metabolizes glucose for energy production.* ALA has the...
  • BENFOTIAMINE AND ALPHA-LIPOIC ACID - are two bioactive compounds that share common goals in important areas of health. Doctor's Best Benfotiamine 150...
  • Label images may vary
SaleBestseller No. 15
Healthy Origins L-Theanine (AlphaWave) 100 mg, 180 Veggie Caps
  • A WAVE OF RELAXATION: L-Theanine is an amino acid found in green tea leaves, and is known to be one of nature’s natural relaxants: it directly...
  • The AlphaWave Difference: Since L-Theanine is found in tea leaves at a very low concentration, it is not practical to produce L-Theanine from Green...
  • Profile Proven Quality Assurance: AlphaWave L-Theanine is manufactured with Profile Proven quality assurance. This quality control program was started...
  • During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when...
Bestseller No. 16
Natures Way, L Theanine, 60 Veg Capsules
  • Promotes relaxation.*
  • Contains the patented form of L-theanine, Suntheanine.Keep out of reach of children
  • Contains 100 mg L-theanine per serving.
  • Helps you get the rest and relaxation you need.*
  • Gluten-free and vegetarian. No salt, yeast-derived ingredients, corn, wheat, soy, dairy, or artificial colors, flavors, or preservatives.
SaleBestseller No. 17
Doctor's Best Quercetin Bromelain, Immunity Support, Heart, Joint & Healthy Respiratory System,...
  • POTENT COMBINATION - Quercetin Bromelain enhances each other's antioxidant and anti-inflammatory potential. Quercetin is a bioflavonoid that has...
  • Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product...
  • QUERCETIN BROMELAIN HEALTH BENEFITS - help support immune health, heart health, joint comfort, healthy digestions, respiratory health and inflammatory...
  • IMMUNE SYSTEM - Quercetin helps ensure appropriate immune response, inhibits formation of free radicals and promotes circulatory health in part by...
  • DIETARY SUPPLEMENT - High Potency Bromelain 3000 GDU per capsule, has 500 Mg of Quercetin with 250 Mg Bromelain in a serving size of 2 Veggie Capsules
SaleBestseller No. 18
Doctor's Best Benfotiamine, Non-GMO, Vegan, Gluten Free, Soy Free, Helps Maintain Blood Sugar...
  • Doctor’s Best Benfotiamine is a fat-soluble highly bioavailable derivative of thiamine (Vitamin B1).* Benfotiamine is activated in the bloodstream...
  • GLUCOSE METABOLISM SUPPORT – Glucose is one of our body’s best sources of energy - and is available through bread, fruits, vegetables and more....
  • MANAGE YOUR BLOOD SUGAR – Benfotiamine is a fat-soluble derivative of thiamine, a super nutrient linked to maintaining normal glucose levels.* A...
  • MAINTAINS NERVOUS SYSTEM HEALTH – by taking Benfotiamine the blood levels of vitamin B1 can be boosted, supporting the body’s nerves and nervous...
  • Label images may vary
SaleBestseller No. 19
Doctor's Best PepZin GI, Zinc-L-Carnosine Complex, Non-GMO, Vegan, Gluten Free, Soy Free, Digestive...
  • Promotes a healthy stomach lining and environment
  • Helps relieve occasional gastric discomfort & maintin a healthy GI environment
  • Label images may vary
  • During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when...
SaleBestseller No. 20
Doctor's Best L-arginine HCL Powder, Non-GMO, Vegan, Gluten Free, Soy Free, Helps Promote Muscle...
  • DOCTOR'S BEST L-ARGININE HCL POWDER - an amino acid vital in the synthesis of nitric oxide, which is an essential compound that helps blood...
  • AMINO ACID AND NITRIC OXIDE FORMULA - helps support athletic endurance and helps boost nitric oxide production. Cardio fitness, pre-workout,...
  • L-ARGININE - also helps regulate blood pressure, helps improve cardiovascular health, Helps support a healthy immune system, helps improve blood sugar...
  • L-ARGININE - is a necessary precursor to Creatine which helps supply energy to all of the cells of the body.*
  • RESEARCH - suggests that L-Arginine supplementation helps increase muscle mass and may also be beneficial in improving endurance as it is a precursor...

Having trouble finding a great doctors suntheanine?

This problem is well understood by us because we have gone through the entire doctors suntheanine research process ourselves, which is why we have put together a comprehensive list of the best doctors suntheanines available in the market today.

After hours of searching and using all the models on the market, we have found the best doctors suntheanine for 2023. See our ranking below!

How Do You Buy The Best Doctors Suntheanine?

Do you get stressed out thinking about shopping for a great doctors suntheanine? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching doctors suntheanine, which is why we have assembled a comprehensive list of the greatest doctors suntheanine available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for doctors suntheanine that you consider buying. Your questions might include the following:

  • Is it worth buying an doctors suntheanine?
  • What benefits are there with buying an doctors suntheanine?
  • What factors deserve consideration when shopping for an effective doctors suntheanine?
  • Why is it crucial to invest in any doctors suntheanine, much less the best one?
  • Which doctors suntheanine are good in the current market?
  • Where can you find information like this about doctors suntheanine?

We’re convinced that you likely have far more questions than just these regarding doctors suntheanine, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for doctors suntheanine, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible doctors suntheanine. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an doctors suntheanine buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available doctors suntheanine currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of doctors suntheanine has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an doctors suntheanine?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your doctors suntheanine.
  5. Customer Ratings: Number ratings grade doctors suntheanine objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their doctors suntheanine.
  7. Product Quality: You don’t always get what you pay for with an doctors suntheanine, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an doctors suntheanine is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining doctors suntheanine information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding doctors suntheanine is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: What are the best L-theanine supplements?

A: Doctor’s Best is another theanine supplement that gets you the the additional assurance of Suntheanine, the proprietary L-theanine that’s used in the majority of studies that show the benefits of L-theanine. While still getting a great value, Doctor’s Best is a solid option. Shop Doctor’s Best L-Theanine at amazon.com

Q: What is suntheanine (L-theanine)?

A: Suntheanine, which is produced in a way that mimics the natural process of green tea leaves, is the type of l-theanine found in many popular supplements. Here’s everything you need to know about Suntheanine, l-theanine, and the best supplements to try.

Q: Can suntheanine help you sleep better?

A: The clinical trials that have been conducted have shown that regular Suntheanine supplementation results in a state of relaxation without the drowsy factor, along with improved sleep, fewer PMS symptoms, and more.

Q: How much does L-theanine cost?

A: At just $.09 per 200 mg of L-theanine and $10.99 for 120 capsules of 200 mg each, cost-wise it doesn’t get much better than this. One thing to note is that Nutricost doesn’t use Suntheanine, so if you’re concerned about quality, this may not be the supplement for you. Shop Nutricost L-Theanine at Amazon Suntheanine L-theanine runner up