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) · 1– per day

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• Be levels

  4.7 (262)

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  Tr.ª Costa Brava, 6, Fuencarral-El Pardo, 28034 Madrid

  Directions919 46 94 11

• Viamoalta Pharma

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  Av del Santuario de Valverde, 11, 0, LOCAL, Fuencarral-El Pardo, 28049 Madrid

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• Laproteina.es

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  C. de los Huertanos, 6, Loc, 30140 Santomera, Murcia

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• Maghreb Nutrition

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

  Directions+212 6 29 33 19 04

• NUTRIDEON

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  Av. de Filipinas, 40, Chamberí, 28003 Madrid

  Directions910 07 52 60

• The Protein House

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  C. de Juan de Vera, 5, Arganzuela, 28045 Madrid

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• PaleoLife España/Europa

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  C. del Doce de Octubre, 3, Retiro, 28009 Madrid

  Directions619 23 97 70

• Tequial Healthy Aging Laboratory

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  C. de Víctor Andrés Belaunde, 48, Chamartín, 28016 Madrid

  Directions915 98 31 78

• 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

  … Our findings suggest that L-theanine has the potential to promote mental health in the … effects of four weeks L-theanine administration (200 mg/day, four weeks) in a healthy population, ie…

  2019362 citations

• The effect of green tea amino acid L-theanine formulation on markers of stress and quality of sleep (THESleep project)–a study protocol for a pilot randomised control …

  A Bulman, A McKune, E Georgousopoulou… - Contemporary Clinical …, 2026 - Elsevier

  … Examining the effect of Ltheanine on sleep: a systematic review of dietary supplementation trials. Nutritional Neuroscience, 29(2), 224-238. https://doi.org/10.1080/1028415X.…

  2026

• 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 … -term supplementation with AlphaWave ® l-Theanine on moderately stressed healthy adults …

  202149 citations

• Dose–response effect of L-theanine on psychomotor speed, sustained attention, and inhibitory control: a double-blind, placebo-controlled, crossover study

  TL Dassanayake, D Wijesundara… - Nutritional …, 2023 - Taylor & Francis

  … however, have tapped into this variety and the hierarchical nature of attentional deployment ( Table 1 ) [Citation18–20, Citation23]. In this background, we hypothesized that any …

  202318 citations

• Anti-stress, behavioural and magnetoencephalography effects of an L-theanine-based nutrient drink: a randomised, double-blind, placebo-controlled …

  DJ White, S De Klerk, W Woods, S Gondalia, C Noonan… - Nutrients, 2016 - mdpi.com

  … of water or 50-mg and 200-mg doses of l-theanine in female … 60 min following 200-mg l-theanine administration compared … 105 min after up to 50 mg of l-theanine, consumed as part of …

  2016180 citations

• L-theanine improves neurophysiological measures of attention in a dose-dependent manner: a double-blind, placebo-controlled, crossover study

  TL Dassanayake, CN Kahathuduwa… - Nutritional …, 2022 - Taylor & Francis

  … whether oral administration of L-theanine acutely enhances … Discussion: The findings indicate L-theanine can increase … warrant further studies with higher doses of L-theanine. …

  202221 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2019-09-24. DSLD Label ID: 205251. 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.