L-Theaninenone

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Serving Size: 1 Capsule(s) · 1 per day

Not Present

• 

  L-Theanine Pure Encapsulations

  PureFormulas.com4.8(186)

  $65.50
• 

  Sports Research L-Theanine Suntheanine Softgels

  Sports Research4.7(1100)

  $38.95
• 

  Theanine Thorne

  Thorne4.8(539)

  $68.00
• 

  Micro Ingredients Pure L-Theanine Powder

  Micro Ingredients3.8(54)

  $24.95
• 

  Now Foods L-Theanine 60 Capsules

  iHerb4.7(1300)

  $15.91
• 

  Spring Valley L-Theanine Capsules 100 mg 100 Count

  Walmart4.4(307)

  $6.43Lowest
• 

  Nutricost L-Theanine Powder

  Target4.7(1600)

  $15.95
• 

  Svasthya Pure L-Theanine Drops

  Svasthya Body & Mind

  $17.95

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• Willner Chemists

  4.7 (146)

  Vitamin & supplements store

  100 Park Ave, New York, NY 10017

  Directions(800) 633-1106

• Supplement Superstore

  5.0 (1389)

  Vitamin & supplements store

  8420 Eager Rd, St. Louis, MO 63144

  Directions(314) 961-3935

• Cymbiotika LLC

  4.7 (345)

  Vitamin & supplements store

  5825 Oberlin Dr #5, San Diego, CA 92121

  Directions(855) 983-8888

• SameDaySupplements.com

  4.5 (503)

  Vitamin & supplements store

  64 Nancy St Unit c, West Babylon, NY 11704

  Directions(631) 539-7339

• GNC

  4.7 (202)

  Vitamin & supplements store

  2 Pennsylvania Plaza Ste 29B, New York, NY 10121

  Directions(212) 239-1251

• Village Green Apothecary

  4.8 (490)

  Vitamin & supplements store

  5415 W Cedar Ln, Bethesda, MD 20814

  Directions(301) 530-0800

• LEAN Nutraceuticals, Inc.

  5.0 (1)

  Vitamin & supplements store

  902 S Randall Rd #300c, St. Charles, IL 60174

  Directions(855) 382-4296

• GNC

  4.4 (92)

  Vitamin & supplements store

  753 Broadway Spc 753, New York, NY 10003

  Directions(212) 380-5999

• L‐Theanine: properties, synthesis and isolation from tea

  QV Vuong, MC Bowyer… - … of the Science of Food and …, 2011 - Wiley Online Library

  … In this review article, the properties and health benefits of … with daily consumption of pure L-theanine of at least 50 mg, an … between 150 and 250 mg L-theanine, doses which would not …

  2011321 citations

• l-theanine: From tea leaf to trending supplement–does the science match the hype for brain health and relaxation?

  R Dashwood, F Visioli - Nutrition Research, 2025 - Elsevier

  … of this nutraceutical supplement marketed for brain health and … in the use of l-theanine supplements at pharmacologic doses … this trending supplement for brain health and relaxation. …

  202526 citations

• L-theanine as a functional food additive: Its role in disease prevention and health promotion

  J Williams, J Kellett, PD Roach, A McKune… - 2016 - openresearch.newcastle.edu.au

  … However, the method was found to be less than viable due to the mediocre purity … L-theanine uptake and metabolism in healthy participants are comparable after ingestion of L-theanine …

  201678 citations

• The effects of green tea amino acid L-theanine consumption on the ability to manage stress and anxiety levels: a systematic review

  JL Williams, JM Everett, NM D'Cunha, D Sergi… - Plant foods for human …, 2020 - Springer

  … The green tea amino acid, L-theanine (L-THE) is associated with several health benefits, … the effect of pure L-THE intake, in the form of orally administered nutritional supplements, on …

  2020221 citations

• L-theanine, unique amino acid of tea, and its metabolism, health effects, and safety

  D Türközü, N Şanlier - Critical reviews in food science and nutrition, 2017 - Taylor & Francis

  … the L-theanine will bring light on the further studies regarding its health effects. The lag time of 25–100 mg doses taken from L-theanine as rich tea and from biosynthetic L-theanine as …

  2017250 citations

• L-Theanine Supplement: Benefits, Dosage & What to Look For

  K Andrews, L An - noobru.com

  … jar filled with capsules on a vibrant pink background, showcasing health supplements. A glass jar filled with capsules on a vibrant pink background, showcasing health supplements. …

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2021-06-23. DSLD Label ID: 248696. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.