L-Theanine 200 mg

Suggested Use

Directions: As a dietary supplement; take one capsule daily or as directed by a healthcare practitioner.

• 

  Bluebonnet Nutrition Bluebonnet L-Theanine 200 mg

  Walmart - Bluebonnet Nutrition4.0(4)

  $19.96
• 

  BlueBonnet Nutrition L-Theanine 200 mg, 30 Count (Pack of 2)

  Optimist4.0(4)

  $10.21
• 

  Bluebonnet Nutrition, L-Theanine

  Mercato.com

  $12.99
• 

  Bluebonnet Nutrition Bluebonnet Targeted Choice Stress Relief

  Walmart - Bluebonnet Nutrition5.0(3)

  $35.16
• 

  Blue Bonnet Power Thought Supplement

  Instacart5.0(5)

  $21.69
• 

  L-THEANINE 200 capsules

  NutriKey4.8(27)

  $21.50
• 

  Dr aziz L-Theanine Supplement

  Dr Aziz Pharmacy

  $37.71
• 

  Bluebonnet Nutrition Bluebonnet Targeted Choice Sleep Support

  Walmart3.8(6)

  $27.16

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 (120)

  Vitamin & supplements store

  2125 US-1 C, St. Augustine, FL 32086

  Directions(904) 797-1578

• GNC

  4.1 (51)

  Vitamin & supplements store

  200 Cbl Dr #102, St. Augustine, FL 32086

  Directions(904) 826-1333

• Nutrishop St. Augustine

  5.0 (61)

  Vitamin & supplements store

  124 Tuscan Way #103, St. Augustine, FL 32092

  Directions(904) 342-7272

• Diane's Natural Market

  4.1 (272)

  Vitamin & supplements store

  841 S Ponce De Leon Blvd Ste 6, St. Augustine, FL 32084

  Directions(904) 808-9978

• GNC

  3.9 (48)

  Vitamin & supplements store

  2700 FL-16 Spc 202, St. Augustine, FL 32092

  Directions(904) 824-4999

• The Vitamin Shoppe

  4.5 (162)

  Vitamin & supplements store

  4668 Town Crossing Dr #101, Jacksonville, FL 32246

  Directions(904) 928-9268

• The Vitamin Shoppe

  4.5 (114)

  Vitamin & supplements store

  5234 FL-100 #101-102, Palm Coast, FL 32164

  Directions(386) 313-2650

• GNC

  3.8 (18)

  Vitamin & supplements store

  152 Capital Green Drive #30, Ponte Vedra Beach, FL 32081

  Directions(904) 834-1165

• Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials

  J Cotter, CE Caddick, JL Harper… - Nutritional …, 2026 - Taylor & Francis

  … , supplementation with 200–450 mg/day of L-theanine appears to be a safe and effective way to support healthy … 9 of the 11 that used a dose ≥200 mg/day (see Table 1 ). Improvements …

  20269 citations

• The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis

  A Bulman, NM D'Cunha, W Marx, M Turner… - Sleep medicine …, 2025 - Elsevier

  … in the management of sleep disturbances; however, the lack of studies on “pure” L-theanine … of L-theanine supplementation for improving and maintaining sleep quality in healthy and …

  202529 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. …

  202525 citations

• A Randomized, Triple-Blind, Placebo-Controlled, Crossover Study to Investigate the Efficacy of a Single Dose of AlphaWave®l-Theanine on Stress in a Healthy Adult …

  M Evans, AC McDonald, L Xiong, DC Crowley… - Neurology and …, 2021 - Springer

  … , participants were administered a 200 mg single dose of AlphaWave ® l-Theanine, and the … Therefore, future research is warranted in long-term supplementation with l-theanine in the …

  202145 citations

• 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

  … study that showed supplementation with l-theanine (200 mg/day) for four weeks in healthy adults significantly … Moreover, l-theanine supplementation (400 mg/day) for 17 days in …

  202423 citations

• Getting a Head Start

  K Chiarello-Ebner - wholefoodsmagazine.com

  … , director of R&D and national educator at Bluebonnet Nutrition Corporation, Sugar Land, TX… that several supplements (like 5-HTP, L-tryptophan, St. John’s Wort, SAMe, L-theanine and …

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2019-06-24. DSLD Label ID: 203818. 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.