Theanine 200 mg

Suggested Use

Usage: Take 1 capsule per day with water or juice on an empty stomach or as directed by your qualified healthcare professional.

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.

• Ohio Valley Nutrition

  5.0 (500)

  Vitamin & supplements store

  67765 Mall Ring Rd #963, St Clairsville, OH 43950

  Directions(740) 296-5816

• GNC

  4.0 (13)

  Vitamin & supplements store

  67800 Mall Rd Unit 680, St Clairsville, OH 43950

  Directions(740) 695-7212

• The Vitamin Shoppe

  4.2 (95)

  Vitamin & supplements store

  210 Settlers Ridge Center Dr, Pittsburgh, PA 15205

  Directions(412) 787-0369

• GNC

  2.8 (5)

  Vitamin & supplements store

  193 Millers Run Rd Bldg 5, SPC C, Bridgeville, PA 15017

  Directions(412) 677-1005

• GNC

  4.3 (19)

  Vitamin & supplements store

  1214 Lafayette Ave, Moundsville, WV 26041

  Directions(304) 845-8095

• The Vitamin Shoppe

  4.6 (59)

  Vitamin & supplements store

  20273 Rte 19, Cranberry Twp, PA 16066

  Directions(724) 742-0985

• GNC

  4.1 (17)

  Vitamin & supplements store

  258 Three Springs Dr, Weirton, WV 26062

  Directions(304) 723-3429

• The Vitamin Shoppe

  4.6 (126)

  Vitamin & supplements store

  4333 Everhard Rd NW #2, Canton, OH 44718

  Directions(330) 966-8361

• L-Theanine Nootropic Review: Benefits, Side Effects & Dosage

  HMDLT Cost - nootropicology.com

  … health food stores, online retailers, and supplement shops. Reputable brands like NOW Foods, Jarrow Formulas… Many studies have shown benefits at 200 mg per dose. Some users find …

• Coenzyme Q10 Protects A Breaking Heart

  A Thomas - jarrow.com

  A landmark study published in the Journal of the American College of Cardiology: Heart Failure reported supplementation with coenzyme Q 10(CoQ 10) reduced medical complications …

• The beneficial health effects of green tea amino acid l‐theanine in animal models: Promises and prospects for human trials

  J Williams, D Sergi, AJ McKune… - Phytotherapy …, 2019 - Wiley Online Library

  … Supplementation regimens in mice have also shown that l-THE at a dose of 80 mg/kg and cysteine (200 mg/kg) per day can enhance serum antigen-specific IgG production by …

  201982 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 … the use of l-theanine supplements at pharmacologic doses by … this trending supplement for brain health and relaxation. …

  202525 citations

• Improvement of both human and animal memory by synergy between fructooligosaccharide and L‐theanine function establishing a safe and effective food supplement

  Y Li, Y Jiang, Z Zhang, VIP Loake, X Bao… - Food science & …, 2024 - Wiley Online Library

  … of healthy adults after 1 month of consumption. Our results suggest that a combination of FOS and L-theanine … Also, the KM mice administered with 200 mg/kg L-theanine exhibited both …

  202412 citations

• Keyora Research Notes Series (L-Theanine Episode 10): Mapping L-Theanine to Your Neurobiology-Safety, Dosage, and Functional Timing Protocols

  J Xu - Keyora Nutritional Neurology, 2025 - academia.edu

  … Sixteen healthy volunteers received alprazolam (1 mg), L-theanine (200 mg) or placebo in a … windows: 150–200 mg before high-stakes decisions 200–300 mg for burnout prevention & …

  2025

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2021-02-25. DSLD Label ID: 243576. 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.