Suntheanine Reviews – Is This Supplement Really Helpful?

Stress-Relax Suntheanine L-Theanine is a chewable supplement that works quickly to promote a relaxed and calm state of mind.

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In This Review

Overview of Suntheanine

Suntheanine is a patented pure form of L-Theanine that is found in green tea and promotes mental clarity, focus, and relaxation without drowsiness.

This ingredient, which is the main component in Dr. Murray’s Stress Relax Suntheanine L-Theanine chewable tablets, was awarded the “Food Ingredient Research Award” at the 1998 Food Ingredients Europe and “Best New Product of 2000” at Nutracon.

Suntheanine, which is produced via a proprietary enzymatic process that guarantees pure L-Theanine for best results, is protected by over 40 U.S. and international patents.

How Does It Rate?

Overall Rating: 3.7
Suntheanine Depression SupplementSuntheanine Depression Supplement


Value for Cost

3.6/5Value for Cost
Return Policy

3.5/5Return Policy


Brand Highlights

  • This antidepressant is manufactured by Natural Factors.
  • It is available at health food and vitamin shops, as well as through several online stores.

Key Ingredients

  • Suntheanine L-Theanine
  • Organic cane sugar
  • Xylitol
  • Stearic acid
  • Silica
  • Natural fruit flavor
  • Citric acid
  • Magnesium stearate


  • Suntheanine is a patented and pure form of L-Theanine, which is found in green tea and has received accolades from Nutracon and the 1998 Food Ingredients Europe
  • Human clinical research backs up claims that Suntheanine can promote mental clarity and relaxation
  • This leading antidepressant is available in tropical fruit flavoured chewable form
  • Dr. Murray’s Stress Relax Suntheanine L-Theanine chewable tablets are available in stores and online


  • No free samples are offered
  • A money back guarantee is not offered
  • Product cannot be purchased on the Natural Factors website and prices vary from one site to the next
  • The results of clinical trials are not available on the manufacturer’s website

How Does Suntheanine Work?

This product contains pure L-Theanine, an amino acid found in green tea. Clinical research has shown that 50 mg to 200 mg of Suntheanine can stimulate alpha waves in the brain, which can lead to a relaxed and alert state of mind. This ingredient may also prevent jitters caused by caffeine, promote learning and memory, and reduce nervous tension.

Further clinical research suggests it can improve sleep, support the immune system, and relieve symptoms associated with premenstrual syndrome.

Dr. Murray’s Stress Relax Suntheanine L-Theanine tropical fruit flavoured chewable tablets contain 200 mg of Suntheanine.

The recommended dosage is 1-2 tablets, three times per day or as directed by a physician.

Suntheanine Ingredients – Are they Safe & Effective?

Suntheanine Supplement Facts

Suntheanine Supplement Facts

Suntheanine contains the following active ingredients:

Suntheanine L-Theanine: 200 mg

– Suntheanine® has been identified as one of the most beneficial ingredients for stress relief, relaxation, and enhanced sleep quality [1].

Other ingredients include organic cane sugar, xylitol, stearic acid, silica, natural fruit flavor (pineapple, banana, pomegranate, mango, and passion fruit), citric acid, and magnesium stearate (vegetable grade).

Stress-Relax Chewable Suntheanine L-Theanine – FAQ’s

Q: How Should You Take Stress-Relax Chewable Suntheanine L-Theanine?

A: The recommended dosage for Dr. Murray’s Stress Relax Suntheanine L-Theanine chewable tablets is 1-2 tablets taken three times daily. No known side effects have been reported.

Q: What Are The Precautions To Take While Using This Supplemente?

A: If you are pregnant, nursing, or trying to conceive, or if you are taking medication, have a medical condition, or are about to have surgery, see your doctor before using this product. Keep out of children’s reach.

Q: Where To Buy Suntheanine Supplement?

A: You can buy it from Amazon and Walmart.

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Suntheanine Review – Final Verdict

The main ingredient in this product, Suntheanine, has garnered awards for its ability to promote relaxation.

It is non-habit-forming and is available in fruit-flavored chewable tablets for those who are not comfortable ingesting capsules.

Since Natural Factors does not offer consumers the opportunity to purchase this product through its website, interested individuals may have to research several sites in order to compare prices.

These tablets are available in health food and vitamin shops.

The manufacturer has not made information pertaining to clinical research performed on this natural antidepressant available on its website, but a number of links are provided that contain research about the effectiveness of L-Theanine.

Depression and anxiety are common disorders that can make daily tasks extremely challenging. Some estimates allege that approximately one in ten Americans suffer from some level of depression and/or anxiety. Symptoms of anxiety and depression include ongoing feelings of sadness accompanied by unease, irritability, tension, and nervousness. While some people require medication to deal with these occasionally crippling symptoms, others may find an all-natural product helpful. An all natural relaxation supplement should promote healthy neurological function. All ingredients should be clinically proven to reduce feelings of anxiousness, sadness, unease, irritability, tension, and nervousness.

Below you'll find some of the most effective natural nervousness relief supplements on the market today, in our opinion.

Our Top Depression Choices

Verdict on Claimed Benefits: Below is our summary of the available evidence for the claimed benefits of below mentioned depression supplements based on the available research:

VitaPost Stress Support | Ashwagandha & Chamomile
Supports Daily Stress*Gold Star Evidence
Keeps Mind Positive*Gold Star Evidence
Prevents Chronic Stress*Gold Star Evidence
Provides Relaxation*Strong Evidence
Rating Breakdown
Support for Claims:
Ingredient Safety:
Value for the Price:
Brand Transparency:
Overall Rating: 4.9
Restilen | Stress Relief and Relaxation
Maintains a Positive Mood*Gold Star Evidence
Reduces Stress Symptoms*Strong Evidence
Combats Fatigue*Gold Star Evidence
Boosts Energy Levels*Strong Evidence
Rating Breakdown
Support for Claims:
Ingredient Safety:
Value for the Price:
Brand Transparency:
Overall Rating: 4.8
NuviaLab Relax | Stress Relief Mood Support
Promotes Relaxation*Gold Star Evidence
Supports Calmness*Strong Evidence
Improves Quality of Sleep*Strong Evidence
Enhances Cognitive Function*Strong Evidence
Rating Breakdown
Support for Claims:
Ingredient Safety:
Value for the Price:
Brand Transparency:
Overall Rating: 4.8

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Consumer Health Digest. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer. *All individuals are unique. Your results can and will vary.

Customer Reviews for Suntheanine

Suntheanine Reviews – Is This Supplement Really Helpful?

Customer Reviews & Ratings

3.0 out of 5

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  1. Daisy J.

    Suntheanine helps me to sleep well.
    I have trouble sleeping because of anxiousness and It causes me to wake up in the middle of the night. Many sleep aids are only effective for around half of the night. This Suntheanine L-Theanine Supplement caught my attention. I’ve taken this at night and it has helped me sleep well. Thanks to  Suntheanine!

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Natural Factors
120 Capsules
Suntheanine L-Theanine, Organic cane sugar, Xylitol, Stearic acid , Silica, Natural fruit flavor, Citric acid, and Magnesium stearate.

1 Sources

We review published medical research in respected scientific journals to arrive at our conclusions about a product or health topic. This ensures the highest standard of scientific accuracy.

[1] Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial:

**This is a subjective assessment based on the strength of the available informations and our estimation of efficacy.

*Result may vary. If you are pregnant, nursing, have a serious medical condition, or have a history of heart conditions we suggest consulting with a physician before using any supplement. The information contained in this website is provided for general informational purposes only. It is not intended to diagnose, treat, cure, or prevent any disease and should not be relied upon as a medical advice. Always consult your doctor before using any supplements.

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