Loading recommendations for you

Adding to Cart...

Added to Cart

Not Added

Item is in your Cart

View Cart

Not Added

There was a problem adding this item to Cart. Please try again later.
We do not have any recommendations at this time
Continue shopping
FREE delivery: Tuesday, Sep 29 Details
Fastest delivery: Sep 23 - 24
Only 1 left in stock - order soon.
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Ships from Amazon
Sold by VirgilBusoi
Ships from

Sold by

Return policy: Returnable within 30 days of receipt
In most cases, items shipped from Amazon.com may be returned for a full refund.
Thorne Research - Theanin... has been added to your Cart

Other Sellers on Amazon
Add to Cart
$74.57 ($0.83 / Count)
+ Free Shipping
Sold by: ExclusiveShopping
Have one to sell?

Thorne Research - Theanine - Amino Acid L-Theanine Supplement for Enhanced Relaxation, Focus, and Memory - 90 Capsules

4.7 out of 5 stars 86 ratings

Price: $57.99 ($0.64 / Count)
  • Relaxation: Promotes relaxation, focus, and memory by enhancing alpha-wave production in the brain*
  • Stress: Supports a healthy stress response*
  • GABA: Enhances GABA production in the brain (a brain chemical that acts like a brake during times of runaway stress)*
  • Free From: Every Thorne product is made with the purest possible ingredients - without gluten or other major allergens (eggs, tree nuts, peanuts). This product also contains no soy, dairy, yeast, shellfish, or fish.
  • Thorne's commitment to integrity and science-backed products has helped us earn the trust of thousands of health-care professionals, U.S. National Teams, the Mayo Clinic, and families around the world.
New (7) from $57.99 + FREE Shipping

Mizuno JPX921 Golf Irons

Frequently bought together

  • Thorne Research - Theanine - Amino Acid L-Theanine Supplement for Enhanced Relaxation, Focus, and Memory - 90 Capsules
  • +
  • Thorne Research - 5-Hydroxytryptophan (5-HTP) - Serotonin Support for Sleep and Stress Management - 90 Capsules
  • +
  • Thorne Research - Vitamin D-5000 - Vitamin D3 Supplement (5,000 IU) for Healthy Bones and Muscles - 60 Capsules
Total price: $110.99
Buy the selected items together

Special offers and product promotions

Have a question?

Find answers in product info, Q&As, reviews

There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews

Your question may be answered by sellers, manufacturers, or customers who purchased this item, who are all part of the Amazon community.

Please make sure that you are posting in the form of a question.

Please enter a question.

Product Description


Theanine, found almost exclusively in the tea plant, helps modify brain waves by increasing alpha-wave production. It also enhances brain neurotransmitters involved in stress management.*

Sleep isn’t just about “getting a good night’s rest.” New information regularly emerges about sleep’s importance to disease prevention, cognitive function, mood, athletic performance, and even maintaining a healthy weight. The adverse health conditions that can occur with chronically poor sleep include diabetes, obesity, infertility, heart disease, sleep apnea, and more. Unfortunately, even though we might be eating right, exercising, and making healthy decisions, we might be neglecting our sleep. In fact, more than 40 percent of U.S. adults don’t get the ideal amount of sleep each night.

One great strategy to get a good night’s sleep is to supplement with nutrients that support sleep’s natural triggers and reduce stress in the body.* Thorne offers supplements that support healthy sleep.*

Product details

  • Is Discontinued By Manufacturer : No
  • Product Dimensions : 2.09 x 2.09 x 3.72 inches; 1.59 Ounces
  • Item model number : SA508
  • Date First Available : April 11, 2005
  • Manufacturer : Thorne Research
  • ASIN : B0797BLW59
  • Customer Reviews:
    4.7 out of 5 stars 86 ratings

Important information

Safety Information

Allergy warning: This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients. This product also does not contain lactose, palmitic acid, or magnesium, calcium, or vegetable stearates. Pregnancy warning: If pregnant, consult your health-care practitioner before using this product. Interactions /Contraindications: There are no known adverse interactions or contraindications at publication date.


One Capsule Contains: L-Theanine* 200 mg. Other Ingredients: Hypromellose (derived from cellulose) capsule, Microcrystalline Cellulose, Leucine, Silicon Dioxide. *This product uses Taiyo International's Suntheanine¨ (L-Theanine). Suntheanine is a registered trademark of Taiyo International, Inc.


Take 1 capsule one to three times daily or as recommended by a health-care practitioner.

Legal Disclaimer

*These statements have not been evaluated by the Food & Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. Please contact your healthcare professional immediately if you experience any unwanted side effects. The information contained herein is for informational purposes only and does not establish a doctor-patient relationship. Please be sure to consult your physician before taking this or any other product.

Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Customer Questions & Answers
Pages with related products. See and discover other items: supplements with amino acids, Explore theanines for children

Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.