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 Softgel(s) · 1 per day

Not Present

• 

  Sports Research L-Theanine Suntheanine Softgels

  Sports Research4.7(1100)

  $38.95
• 

  Sports Research L-Theanine & Caffeine Softgels

  Sports Research4.8(277)

  $22.95
• 

  L Theanine Now Sports Research Double Strength L-Theanine 200mg With Coconut Oil - 120 Softgels Supplement Sleep Aid

  Mobilpcservis.sk

  $23.00
• 

  Sports Research Sleep Complex Melatonin-Free 60 Veggie Capsules

  Sports Research4.0(62)

  $26.95
• 

  L-Theanine Sunthanine 200MG

  fitmarketpma4.5(267)

  $30.45
• 

  Nootropics Depot L-Theanine Capsules

  Nootropics Depot4.5(15)

  $15.99
• 

  Dr aziz L-Theanine Supplement

  Dr Aziz Pharmacy

  $37.71
• 

  Hakala Research L-Theanine 200 Mg 60 Tablets

  Natural Healthy Concepts

  $25.99

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.

• NutriLx Store

  4.9 (135)

  Vitamin & supplements store

  Loja 1 dentro da Estação Metro Campo Pequeno, Av. da República 63B, 1050-189 Lisboa

  Directions934 478 316

• MySuplementos

  4.6 (142)

  Vitamin & supplements store

  R. Shopping loja nº 240, 4520-625

  Directions931 603 333

• BodyOne - Algés

  4.7 (23)

  Vitamin & supplements store

  R. Damião de Góis 15B, 1400-087 Lisboa

  Directions923 128 592

• Nutriforce

  4.8 (216)

  Vitamin & supplements store

  R. Elias Garcia 281F, 2700-321 Amadora

  Directions914 124 753

• Nutranyma

  5.0 (206)

  Vitamin & supplements store

  Tapada das Mercês, Av. Miguel Torga 72 Lj A, 2725-566 Algueirão-Mem Martins

  Directions21 608 1131

• NutriGenes Portugal

  5.0 (20)

  Vitamin & supplements store

  R. Cristovão Pinho Queimado 33 E12, 3800-012 Aveiro

  Directions964 879 898

• Maghreb Nutrition

  4.6 (484)

  Vitamin & supplements store

  Angle Rue Houmane El Fetouaki et, Rue Qortoba, Kenitra 14000, Morocco

  Directions+212 6 29 33 19 04

• Terra Pura Telheiras

  4.8 (5)

  Vitamin & supplements store

  Av. das Nações Unidas, 1600-528 Lisboa

  Directions936 600 100

• … 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 …

  201058 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 …

  202327 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.