L-Theanine 200 mg

Suggested Use

Suggested Use: 1 capsule 1 to 2 times daily.

• 

  Serene Science Theanine Serene 60 Tablets

  iHerb4.8(478)

  $12.25
• 

  Source Naturals Theanine Serene with Relora - 60 Tablets

  iHerb4.7(746)

  $13.99
• 

  Source Naturals L Theanine

  Source Naturals4.7(213)

  $18.98
• 

  Source Naturals L-Theanine 200 mg

  Supplement First4.8(36)

  $35.50
• 

  Source Natural, Theanine Serene, 120 table

  Down to Earth Organic & Natural

  $16.99
• 

  Source Naturals, L-теанин, 200 мг, 120 капсул

  iHerb4.7(683)

  $48.29
• 

  Serene

  recreahealth.com

  $43.00
• 

  Caffeine + L-Theanine Source Naturals

  Herbs Direct4.7(30)

  $9.76

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

  4.3 (184)

  Vitamin & supplements store

  12 4th Ave, Brooklyn, NY 11217

  Directions(718) 858-8314

• GNC

  4.2 (280)

  Vitamin & supplements store

  134-136 Fulton St, New York, NY 10038

  Directions(212) 374-9473

• GNC

  4.4 (92)

  Vitamin & supplements store

  753 Broadway Spc 753, New York, NY 10003

  Directions(212) 380-5999

• Pure Essentials Supplements

  5.0 (2)

  Vitamin & supplements store

  121 Varick St, New York, NY 10013

  Directions(212) 758-3200

• The Vitamin Shoppe

  3.9 (85)

  Vitamin & supplements store

  32 Court St, Brooklyn, NY 11201

  Directions(718) 596-0466

• GNC

  4.7 (202)

  Vitamin & supplements store

  2 Pennsylvania Plaza Ste 29B, New York, NY 10121

  Directions(212) 239-1251

• GNC

  3.7 (106)

  Vitamin & supplements store

  2 Broadway, New York, NY 10004

  Directions(212) 514-5770

• The Vitamin Shoppe

  4.4 (171)

  Vitamin & supplements store

  385 5th Ave, New York, NY 10016

  Directions(212) 532-4534

• 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 …

  202427 citations

• L-theanine, unique amino acid of tea, and its metabolism, health effects, and safety

  D Türközü, N Şanlier - Critical reviews in food science and nutrition, 2017 - Taylor & Francis

  … Similarly, instead of 50 mg, 200 mg L-theanine caused increase in the … L-theanine (200 mg), caffeine (100 mg) or placebo and at the end of the study it was found out that L-theanine …

  2017250 citations

• L-Theanine for Dissociation: Promoting Calm and Presence

  TY Order, USD Australia, EUR Finland, EUR France… - moodriselabs.com

  … L-theanine has been shown to lower cortisol levels in stressful situations. In clinical studies, participants who took 200 mg of L-theanine … a key marker of vagal health. As HRV improves, …

• 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

  … In this study, participants were administered a 200 mg single dose of AlphaWave ® l-Theanine, and the response to an acute stress model was investigated; thus, the efficacy of long-…

  202149 citations

• L-Theanine, the Magic of Green Tea

  A Snow - Prevention, 2021 - camdenwholehealth.com

  … Enter the natural supplement. Capsules of l-theanine at the 200 mg daily dose are available at Emerson Ecologics, and here at the pharmacy at Camden Whole Health. Ask your holistic …

  2021

• … 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

  … In theanine-only, low-caffeine, or caffeine-free interventions, the median theanine dose was 200 mg (IQR, 100.45-212.5). Industry was the most common funding source (n = 8), followed …

  202514 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2023-08-23. DSLD Label ID: 295953. 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.