L-Theanine 200 mg

Suggested Use

Suggested Use: Adults take 1 softgel daily with or without food; or as recommended by a qualified healthcare professional.

• 

  Sports Research L-Theanine Suntheanine Softgels

  Sports Research4.7(1000)

  $38.95
• 

  Sports Research L-Theanine & Caffeine Softgels

  Sports Research4.8(265)

  $22.95
• 

  Nutricost L-Theanine Capsules

  Walmart4.8(6900)

  $5.88
• 

  Sports Research Sleep Complex Veggie Capsules

  Target

  $29.99
• 

  Sports Research Sleep Complex Melatonin-Free 60 Veggie Capsules

  Sports Research3.9(57)

  $26.95
• 

  the Vitamin Shoppe L-THEANINE 200 MG 120 EA

  The Vitamin Shoppe4.2(12)

  $44.99
• 

  Nature Made Chewable L Theanine Tablets

  Target4.4(59)

  $15.79
• 

  Walgreens L-Theanine 200 mg Capsules (60 ct)

  Walgreens.com4.0(4)

  $14.99

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.

• The Vitamin Shoppe

  4.5 (160)

  Vitamin & supplements store

  551 Southpark Blvd, Colonial Heights, VA 23834

  Directions(804) 526-5974

• The Storehouse Natural Products Shop

  4.8 (46)

  Vitamin & supplements store

  2791 S Crater Rd, Petersburg, VA 23805

  Directions(804) 861-1333

• GNC

  4.0 (21)

  Vitamin & supplements store

  248 Southpark Cir Sp F 80, Colonial Heights, VA 23834

  Directions(804) 520-7131

• No Limits Nutrition Center

  4.9 (314)

  Vitamin & supplements store

  1311 W Broad St, Richmond, VA 23220

  Directions(804) 714-7422

• CVS

  2.1 (168)

  Vitamin & supplements store

  2100 S Crater Rd, Petersburg, VA 23805

  Directions(804) 861-4191

• The Vitamin Shoppe

  4.4 (28)

  Vitamin & supplements store

  15600 Hull St, Chesterfield, VA 23832

  Directions(804) 802-0552

• GNC

  3.3 (11)

  Vitamin & supplements store

  300 A Ave Bldg 1605, Fort Lee, VA 23801

  Directions(804) 957-4961

• The Vitamin Shoppe

  4.6 (153)

  Vitamin & supplements store

  11440 Midlothian Turnpike Ste A, Richmond, VA 23235

  Directions(804) 379-6259

• … and theanine supplementation on physical and cognitive performance in competitive athletes: a randomized, double-blind, placebo-controlled crossover study

  SY Tuncer, S Ozdenk, UC Yildirim, D Erkan… - Frontiers in …, 2026 - frontiersin.org

  … In a study evaluating sport-specific throwing and cognitive … , this study examined the effects of acute L-theanine, caffeine … of our study is that acute ingestion of 200 mg L-theanine was …

  20261 citations

• The Effect of L-Theanine Supplementation on Balance, Cognitive function, Anaerobic Power and Fatigue index in Trained Male Wushu Athletes

  A Jebelli, A Ghasemnian, H Norouzi - … of Applied Health Studies in Sport …, 2024 - sid.ir

  … The aim of this study was to investigate the effect of L-theanine supplementation on balance, … the placebo group received a 200 mg flour capsule and in the supplement group a 200 mg …

  20242 citations

• Effects of supplement L-theanine on cognitive anxiety, salivary alpha-amylase, and cortisol in archery competition

  IS Lim - Physical Activity and Nutrition, 2024 - pmc.ncbi.nlm.nih.gov

  … that 200 mg of L-theanine resulted … study aims to analyze the effects of L-theanine administration on cognitive anxiety levels, sAA, and cortisol during official archery competitions, a …

  20243 citations

• Performance-enhancing effects of caffeine and L-Theanine among Iranian elite wrestlers: a focus on cognitive and specific physical performance

  R Razazan, M Hemmatinafar, B Imanian… - … Society of Sports …, 2025 - Taylor & Francis

  … 3.5 mg/kg), 200 mg of L-theanine (~3 mg/kg), both, or neither. Caffeine increased alertness, anxiety, and blood pressure, while L-theanine … In our study, adding L-theanine did not create …

  20257 citations

• Suppression of exercise-induced neutrophilia and lymphopenia in athletes by cystine/theanine intake: a randomized, double-blind, placebo-controlled trial

  S Murakami, S Kurihara, CA Titchenal… - … Society of Sports …, 2010 - Taylor & Francis

  … The purpose of the present study was to determine the effects of CT supplementation on the inflammatory response and immune state before and after intense endurance exercise in …

  201056 citations

• … single or combined caffeine and L-Theanine supplementation on shooting and cognitive performance in elite curling athletes: a double-blind, placebo-controlled study

  U Yilmaz, Y Buzdagli, ML Polat, Y Bakir… - … Society of Sports …, 2023 - Taylor & Francis

  … administrations of 100 mg/day [Citation66]. Furthermore, a single administration of 200 mg/day … by a single dosage of 200 mg/day [Citation67]. In terms of cognitive function, there are …

  202324 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2025-02-23. DSLD Label ID: 326262. 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.