L-Theanine 200 mg®

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)

Not Present

• 

  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.

• Mother Earth Vitamins and More

  4.8 (46)

  Vitamin & supplements store

  5158 Pleasant Ave, Fairfield, OH 45014

  Directions(513) 894-1131

• GNC

  4.8 (85)

  Vitamin & supplements store

  9850 Colerain Ave, Cincinnati, OH 45251

  Directions(513) 741-9200

• Spring Street Vitamins

  4.8 (31)

  Vitamin & supplements store

  3316 Princeton Rd, Fairfield, OH 45011

  Directions(513) 737-4053

• The Vitamin Shoppe

  4.4 (156)

  Vitamin & supplements store

  5 E Kemper Rd, Cincinnati, OH 45246

  Directions(513) 671-0021

• G & Shirleys Vitamin & Herb Shop Inc

  4.5 (11)

  Vitamin & supplements store

  5844 Hamilton Ave, Cincinnati, OH 45224

  Directions(513) 648-0600

• Complete Nutrition

  4.6 (5)

  Vitamin & supplements store

  10895 Reading Rd, Cincinnati, OH 45241

  Directions(513) 733-1414

• GNC

  3.8 (24)

  Vitamin & supplements store

  1452 Main St, Hamilton, OH 45013

  Directions(513) 737-0990

• The Vitamin Shoppe

  4.6 (115)

  Vitamin & supplements store

  3831 Edwards Rd Ste 500, Cincinnati, OH 45209

  Directions(513) 351-1376

• 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: 203845. 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.