What’s The Best Suntheanine Brand Recommended By An Expert

Are you trying to find the best suntheanine brand? Overwhelmed by all the options? Welcome to your destination. The following is a comprehensive guide to buying suntheanine brand. If you are uncertain where to start your research, do not worry; we have you covered.

The sheer number of options out there makes going through thousands of reviews extremely frustrating. Look over the reviews, then make an informed purchasing decision based on this ultimate guide.

10 Best suntheanine brand Reviews in 2023

1. Stress-Relax Chewable Suntheanine L-Theanine 100 mg by Natural Factors, Non-Drowsy Stress Support for Mental Calmness and Relaxation, Tropical Fruit Flavor, 120 Tablets

Features :

  • Combat stress with pure L-Theanine, a unique amino acid found in green tea that helps you feel calm and relaxed;* Fast-acting and non-drowsy formulation for healthy mood and alertness*
  • We use a proprietary enzymatic process to produce pure L-Theanine for maximum effectiveness* in a tasty tropical fruit-flavored chewable tablet
  • Improve the quality of your sleep, learning performance and concentration with L-Theanine;* Helps reduce the negative effects of caffeine*
  • Chew 1–2 tablets 3 times per day; This supplement is non-GMO, non-habit forming, free of gluten and soy and suitable for vegetarians and vegans
  • Independently tested and third-party certified for GMOs and over 800 contaminants using advanced technology such as mass spectrometry to ensure purity and potency

Additional Info :

Item Dimensions
Height 4.75
Width 3.06
Length 3.06
Weight 0.6
Release Date 2014-03-19T00:00:01Z

2. Sports Research L-Theanine 200mg with Organic Coconut Oil – Suntheanine Supplement for Focus, Relaxation & Alertness – Non-Drowsy Support, Non-GMO & Gluten Free – 120 Liquid Softgels

Features :

  • BRAIN + MOOD SUPPORT: Sports Research L-Theanine softgles help increase Alpha brain wave activity, the same waves created when practicing meditation or mindfulness.* Alpha waves are an indication of a relaxed, focused, and alert mind.*
  • PATENTED SUNTHEANINE: Made with Suntheanine, a patented form of L-theanine that mimics the natural process in green tea leaves, resulting in a 100% pure L-isomer-theanine.* Suntheanine is protected by over 40 U.S. patents and is GRAS (Generally Recognized as Safe) affirmed.
  • L-THEANINE 200MG: Each liquid softgel provides 200mg of Suntheanine L-theanine complexed with Extra Virgin Organic Coconut Oil. Best paired with Magnesium L-Threonate for better sleep and relaxation.*
  • QUALITY TESTED: We hold all of our supplements to a higher standard. Our L-theanine softgels are non-GMO verified and free of gluten, silicon dioxide, and magnesium stearate. Manufactured in the USA in a cGMP-compliant facility and 3rd party tested for quality.
  • THE SPORTS RESEARCH DIFFERENCE: Founded in Southern California in 1980, Sports Research is a family-owned business born from a passion for fitness and wellness. Our goal is to embrace the sport of life through research-backed products created for every body—inside and out.

Additional Info :

3. Stress-Relax Suntheanine L-Theanine 125 mg by Natural Factors, Non-Drowsy Stress Support for Mental Calmness and Relaxation, 60 capsules (30 servings)

Features :

  • 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 night
  • 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 and potency

Additional Info :

Item Dimensions
Height 3.87
Width 2.19
Length 2.19
Weight 0.1

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

Features :

  • 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 process in green tea leaves. L-Theanine helps promote a healthy mood and a restful relaxed state while maintaining daytime alertness
  • 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
  • CALMNESS – L-Theanine supports relaxation and a sense of calm without causing drowsiness or loss of focus. This amino acid found naturally in tea helps support healthy stress response, relaxation, focus and memory
  • SUPPORTS BRAIN HEALTH – L-Theanine is a powerful Amino Acid that enhances cognitive performance and alertness. L-Theanine may help improve quality of sleep, learning performance, concentration and help support the immune system. L-Theanine may also help reduce the negative effects of caffeine
  • SUNTHEANINE – L-theanine is an agent that is used for nervousness and tension by supporting mental tranquility. Suntheanine may normalize the body’s stress response and condition the body to handle stressful situations better
  • During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers’ recommendations, when provided.

Additional Info :

Item Dimensions
Height 3.69
Width 2.13
Length 2.13
Weight 0.00033

5. BESTVITE L-Theanine 200mg with Patented and Clinically Studied Suntheanine (60 Vegetarian Capsules) – No Stearates – Vegan – Non GMO – Gluten Free

Features :

  • CLINICALLY STUDIED PATENTED INGREDIENT: Suntheanine is a high-purity, L-isomer form of the amino acid theanine, produced via a patented fermentation process that mimics the natural process in green tea leaves.
  • FOCUS AND RELAXATION SUPPORT: Suntheanine can help support mental alertness and focus. It can also support relaxation and stress without causing drowsiness.*
  • PURE FORMULA: Bestvite Suntheanine contains no stearates, is non-GMO, gluten-free, vegan, and comes in an additive-free capsule. Each capsule contains 200 mg of Suntheanine.
  • BESTVITE GUARANTEE: All Bestvite products are manufactured in the USA according to GMP. The raw materials and all batches of the finished Suntheanine product are tested by a 3rd party laboratory for purity and potency.
  • NSF GMP CERTIFIED: Bestvite’s facility is NSF/ANSI 455-2 Dietary Supplements Good Manufacturing Practice (GMP) certified. Earning GMP certification from NSF verifies that a manufacturing facility has the proper methods, equipment, facilities, and controls in place to produce dietary supplement products.

Additional Info :

Item Dimensions
Weight 0.14991433816

6. Natural Factors, ( 2 Pack Stress-Relax, Suntheanine, L-Theanine, 125 mg, 60 Vegetarian Capsules

Additional Info :

Item Dimensions
Height 3.8
Width 2.2
Length 2.2
Weight 0.14991433816

7. Swanson Amino Acid Double Potency Suntheanine L-Theanine 200 Milligrams 60 Veg Capsules

Features :

  • Double potency L-theanine supplement
  • Delivers 200 mg per capsule
  • Promotes balanced wellbeing
  • OUR QUALITY COMMITMENT: For nearly 50 years, Swanson has delivered science-backed health products worldwide. Each wellness supplement is made in our GMP certified facilities, and our purity and potency testing includes independent third-party labs.
  • MONEY BACK GUARANTEE: At Swanson, we guarantee that every health product is made from the purest, freshest nutrients. If you aren’t satisfied with any product(s) purchased within the last 30 days, return the unused portion to us for a full refund.

Additional Info :

Item Dimensions
Height 3.5
Width 1.9
Length 1.9
Weight 0.09038952742

8. Tomorrow’s Nutrition – SunTheanine L-Theanine, 100mg Tablets to Help Concentration, Focus, and Stress, 60 Chewable Tablets

Features :

  • Calm, cool, collected: L-Theanine promotes a sense of relaxation and supports concentration in a formula suitable for adults and children
  • Yummy citrus: Each citrus flavored chewable tablet delivers 100mg of L-Theanine that’s sure to please the pickiest of palates
  • Clear mornings: Supports a restful slumber without the mental haze the next morning
  • Effective + clean: Our fermentation process delivers pure L-theanine for a clean, effective formula you can trust
  • Simple, proven, trusted: Tomorrow’s Nutrition believes in enhancing the body’s ability to protect and manage health with clinically studied nutritional support

Additional Info :

Item Dimensions
Height 1.9
Width 1.7
Length 3.2
Weight 0.2

9. Country Life L-Theanine, 200mg Suntheanine L-Theanine, 30 Vegan Capsules, Certified Gluten Free, Certified Vegan, Certified Halal

Features :

  • 200mg Suntheanine – a prominent, clinically-studied form of L-theanine
  • Promotes calm & relaxation without drowsiness – Helps reduce stress and gently soothes away tension – when taken as directed
  • Vitamin B6 – Formulated with B-vitamins for utilization and improved absorption of supplement nutrients
  • Free of – artificial colors, flavors, preservatives, sweeteners, sugar and more
  • Certified – Certified Gluten Free by GFCO, Certified Vegan by AVA,, Certified Halal by IFANCA

Additional Info :

Item Dimensions
Height 3.3
Width 1.8
Length 1.8
Weight 0.23125

10. Stress-Relax Tranquil Sleep by Natural Factors, Sleep Aid with Suntheanine L-Theanine, 5-HTP, Melatonin, 90 Softgels

Features :

  • A good night’ s rest: Our advanced, non-habit-forming blend of natural ingredients helps prepare you for a refreshing and rejuvenating sleep without morning grogginess
  • Sleep soundly, regularly: Calms the nerves and encourages a deeper, uninterrupted rest; Helps support a healthy sleep cycle to reduce occasional sleeplessness
  • A natural sleep aid: Contains Suntheanine L-Theanine (200 mg), 5-HTP (30 mg) and melatonin (3 mg) to support every stage of slumber
  • Two softgels: Taken 30-45 minutes before bedtime; 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 and potency

Additional Info :

Item Dimensions
Height 4.19
Width 2.37
Length 2.37
Weight 0.2

How To Choose The suntheanine brand

Is finding an excellent suntheanine brand a stressful experience? Have you ever been unsure what model to buy when considering the purchase of suntheanine brand in general?

Knowing you’re not alone is sometimes all you need. There are many people who have difficulty finding the perfect suntheanine brand for themselves. This is why we are here to help!

You have obviously come to this page to learn more about Cheap suntheanine brand Reviews. There is a lot of information out there, so to make an informed decision, find a reputable source with a variety of options before committing.

The information you seek can come from many sources – buying guides, ratings websites, word-of-mouth recommendations, online forums where users give their personal experiences, independent product reviews found throughout the internet, and even YouTube channels. The best products can only be found through thorough research.

Right? But isn’t it not always easy to do that? Therefore, we have taken the time to compile a list of the top suntheanine brand products on the market, for your benefit, so that you don’t need to worry.

What led us to compile this list? Why did we make this buying guide?

  • Firstly, we used our algorithms to gather the information about the products that were available from reliable sources.
  • To validate all collected information, both Artificial Intelligence and large data volumes were used.

Our artificial intelligence then evaluated them based on quality-to-price ratios using industry-standard criteria to find the suntheanine brand on the market!

We don’t choose the products at random. Before assembling a list, we take into account several factors. Following are some of the factors we consider:

Brand Value:

If you purchase an unreliable brand just because it is cheap, what will happen? The likelihood of getting an unreliable product increases. The renowned brands are more concerned about maintaining their reputations, while others are not.

The suntheanine brand brands are known for their unique features that distinguish them from the competition. We hope, therefore, that there is a product in our list that will meet your needs.


A few useful features are all that you need. In choosing the top suntheanine brand, we look at the features that really matter.


Quantitative measures of quality are always easy to make when you have numbers at your disposal. As a company, we are striving to find products that exceed the standard, but with the suntheanine brand right balance.

Customer Ratings:

Customers who have used the suntheanine brand before you won’t accuse you of wrongdoing, will they? A good number of people will be pleased with the service, if you have better ratings.

Customer Reviews:

A customer review gives you authentic and reliable information about suntheanine brand, coming from real people who have used it.

Seller Rank:

That’s very interesting, now isn’t it? It’s not just about having a good suntheanine brand, you also have to offer a popular, growing product. Both objectives are met.

It is clear that the product is successful based on its increasing user base. Because of that growing number, the manufacturers should be able to provide better after-sales service and quality.

Value For The Money:

There is a saying about getting what you pay for. The cheapest thing is never the best. Consequently, spending a lot of money on a product that has no real value is also not a good idea. Putting your suntheanine brand on the list involves evaluating what you get for the money you spend.


Reliability and durability are closely related. With a robust and durable suntheanine brand, you’ll be able to use it for many months to come.


A new product replaces an old product every now and then. It probably has some new features, it may have been modified somehow.

Supposedly good products such as suntheanine brand no longer exist because the manufacturer will no longer support them? As much as possible, we try to present products from a handful of trustworthy sellers, if not more.

Negative Ratings:

That’s also something we consider! Products that received mainly negative ratings are discarded from our top rated suntheanine brand list.


#1. Why choose this type of suntheanine brand?

Because suntheanine brand vary drastically in size, knowing what will fit comfortably on to use it. If you are in need of a suntheanine brand that provides high quality support. However, you may decide you don’t need one so high.

#2. How Much Should I Spend on a suntheanine brand?

Ideally, a suntheanine brand is going to live with you for years. Paying more for your product will reward you every time you fast open the lid with increased your speed, better quality accuracy and a sweet view. Again, the average cost of a new suntheanine brand is between $$ and $$$. Sure, you get out on some luxury features.

Final Word

We chose our best suntheanine brand based on these criteria. Is this all there is to it? Of course not! Our website is constantly updated to provide you with the most up-to-date and relevant information.

We have a final layer of filtering because we place reader satisfaction at the top of our list. Thank you for your support! We’d appreciate your feedback or correction if any suntheanine brand mentioned here is incorrect, out of date, outdated, irrelevant, or otherwise inappropriate. We welcome your comments and will make frequent corrections to our list based on your reasonable suggestions.

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