L-Theanine 200 mg

Suggested Use

SUGGESTED USE: Take one capsule per day or as directed by your healthcare practitioner.

• 

  Nature Made Chewable L Theanine Tablets

  Target4.4(59)

  $13.99
• 

  Walgreens L-Theanine 200 mg Capsules (60 ct)

  Walgreens.com4.0(4)

  $14.99
• 

  Jarrow Formulas Theanine 200 mg. 60 Capsules

  Whole Foods Market4.8(1000)

  $33.49
• 

  the Vitamin Shoppe L-THEANINE 200 MG 120 EA

  The Vitamin Shoppe4.2(12)

  $44.99
• 

  Sports Research L-Theanine Suntheanine Softgels

  Sports Research4.7(1000)

  $19.95
• 

  L-Theanine 200 mg 90 capsules

  Walmart - Pattern

  $54.00
• 

  Advance Physician Formulas L-theanine 200 Mg 60 Vegetable Capsules

  Target4.7(127)

  $13.99
• 

  L-THEANINE 200 capsules

  NutriKey4.8(27)

  $21.50

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.

• Naturally Yours Health Foods

  4.5 (36)

  Health food store

  710 Geneva St, Lake Geneva, WI 53147

  Directions(262) 248-9519

• Walgreens

  2.5 (179)

  Vitamin & supplements store

  351 N Edwards Blvd Walgreens, Lake Geneva, WI 53147

  Directions(262) 248-7885

• GNC

  3.1 (32)

  Vitamin & supplements store

  1430 E Geneva St #4, Delavan, WI 53115

  Directions(262) 728-6565

• Supplement Warehouse Retail Store

  4.6 (1281)

  Vitamin & supplements store

  7110 W Greenfield Ave, West Allis, WI 53214

  Directions(414) 539-3543

• The Vitamin Shoppe

  4.2 (126)

  Vitamin & supplements store

  815 Cog Cir #4, Crystal Lake, IL 60014

  Directions(815) 356-9460

• The House of Nutrition & Wellness

  4.6 (71)

  Vitamin & supplements store

  5824 6th Ave, Kenosha, WI 53140

  Directions(262) 652-4787

• The Vitamin Shoppe

  4.5 (109)

  Vitamin & supplements store

  1496 S Randall Rd, Algonquin, IL 60102

  Directions(847) 854-8218

• GNC

  4.2 (41)

  Vitamin & supplements store

  530 E Rollins Rd, Round Lake Beach, IL 60073

  Directions(847) 201-1469

• Safety and Efficacy of AlphaWave®l-Theanine Supplementation for 28 Days in Healthy Adults with Moderate Stress: A Randomized, Double-Blind, Placebo …

  M Moulin, DC Crowley, L Xiong, N Guthrie… - Neurology and …, 2024 - Springer

  … subsequent follow up, and out of range laboratory values and changes in vital signs were … that showed supplementation with l-theanine (200 mg/day) for four weeks in healthy adults …

  202423 citations

• Effects of L-theanine administration on stress-related symptoms and cognitive functions in healthy adults: a randomized controlled trial

  S Hidese, S Ogawa, M Ota, I Ishida, Z Yasukawa… - Nutrients, 2019 - mdpi.com

  … weeks L-theanine administration (200 mg/day, four weeks) in a … -A levels were measured at our laboratory using Salivary enzyme … or placebo administration are shown in Supplementary …

  2019353 citations

• The effect of oral supplementation of L-Theanine and Stress formula vitamin on the stress reduction

  W Mongkonsritragoon - 2015 - mfuir.mfu.ac.th

  … administration of L-Theanine has been has been proven in numerous medical reports like … of orally administered L-Theanine 200 mg or Stress formula vitamin (Stresstab 600 mg) on …

  2015

• … of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic …

  ER Payne, M Aceves-Martins, J Dubost… - Nutrition …, 2025 - academic.oup.com

  … to improve one’s health and well-being. Drinking black tea and supplementation with green tea … -free interventions, the median theanine dose was 200 mg (IQR, 100.45-212.5). Industry …

  202512 citations

• International society of sports nutrition position stand: energy drinks and energy shots

  AR Jagim, PS Harty, GM Tinsley… - Journal of the …, 2023 - Taylor & Francis

  … ), tyrosine, and L-theanine, with prevalence for each … American Medical Association recommends a limit of 500 mg∙… a group of six water-soluble vitamer compounds: pyridoxine, …

  2023156 citations

• Nutritional co-therapy with vitamin D and L-theanine reduces unpredictable mild chronic stress (UCMS) in aged mice by restoring alpha-oscillations, dopamine levels …

  HK Hussain, N Rasheed, Z Rehman, S Hanif… - Experimental …, 2025 - Elsevier

  … Here, we demonstrated that combined vitamin D (Vit D) and L-theanine (L-thea) administration … Co-treatment with L-theanine (2 mg/kg) and vitamin D (500 IU/kg) robustly reversed these …

  20253 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-07-25. DSLD Label ID: 23755. 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.