Suntheanine L-Theanine 150 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.

Serving Size: 1 Capsule(s)

Not Present

• 

  Doctor's Best Suntheanine L-Theanine Veggie Caps

  iHerb4.7(1500)

  $22.99
• 

  Doctor's Best Suntheanine L-Theanine Vegetable Capsules

  Shipman's Pharmacy5.0(1)

  $28.48
• 

  Doctor's Best L-Theanine AlphaWave Veggie Caps

  Vitacost.com4.8(204)

  $15.99Lowest
• 

  Doctor's Best L-Theanine With Suntheanine 150 Mg 90 Vegan Capsules

  Pakuranga Pharmacy

  $42.38
• 

  Doctor's Best L Theanine with Suntheanine

  GoSupps.com

  $149.99
• 

  Nutricost Suntheanine 150mg 60 Capsules

  Walmart - eSupplements, llc

  $17.95
• 

  Solgar L-Theanine 150mg Vegetable Capsules

  Vitacost.com4.7(205)

  $25.49
• 

  Sports Research L-Theanine Suntheanine Softgels

  Glocalzone4.7(1100)

  $27.77

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• VitaminStore24.de - Sport Food

  4.7 (103)

  Vitamin & supplements store

  Damenstiftstraße 2, 80331 München

  Directions089 96194877

• BioTechUSA Alexa

  4.1 (192)

  Vitamin & supplements store

  Alexa Center Gruner Straße 20, 10179 Berlin

  Directions030 37460798

• Supplement Support

  4.9 (93)

  Vitamin & supplements store

  Berliner Allee 237, 13088 Berlin-Bezirk Pankow

  Directions030 92093942

• Supplements

  5.0 (30)

  Vitamin & supplements store

  Ostkreuz Victoria-Center, Marktstraße 6, 10317 Bezirk Lichtenberg

  Directions0176 24270787

• Supernaturals Nutrition GmbH

  4.4 (14)

  Vitamin & supplements store

  Atelierstraße 10, 81671 München

  Directions01579 2526112

• True Nature

  4.6 (51)

  Vitamin & supplements store

  Stolberger Str. 313, 50933 Lindenthal

  Directions0221 95673735

• Usana Health Sciences Deutschland - unabhängiger Vertriebspartner

  4.8 (5)

  Vitamin & supplements store

  Lyonel-Feininger-Straße 23, 80807 München-Schwabing-Freimann

  Directions

• NatuRise UG

  4.9 (403)

  Vitamin & supplements store

  Krummhardter Str. 2, 73773 Aichwald

  Directions

• Keyora Research Notes Series (L-Theanine Episode 10): Mapping L-Theanine to Your Neurobiology-Safety, Dosage, and Functional Timing Protocols

  J Xu - Keyora Nutritional Neurology, 2025 - academia.edu

  … , addresses the critical practicalities of L-Theanine supplementation, challenging the notion … of L-theanine (Suntheanine â ) on attention and reaction time response in 18 normal healthy …

  2025

• L-theanine as a functional food additive: Its role in disease prevention and health promotion

  J Williams, J Kellett, PD Roach, A McKune… - 2016 - openresearch.newcastle.edu.au

  … THE as a supplement as well as a functional food ingredient for its therapeutic health benefits, … Lyon, MR; Kapoor, MP; Juneja, LR The effects of L-theanine (suntheanine(r)) on objective …

  201678 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

  … This systematic review ansd meta-analysis aimed to evaluate the effects of L-theanine, a non-… of L-theanine supplementation on sleep quality in humans of all ages and health status …

  202535 citations

• The effects of green tea amino acid L-theanine consumption on the ability to manage stress and anxiety levels: a systematic review

  JL Williams, JM Everett, NM D'Cunha, D Sergi… - Plant foods for human …, 2020 - Springer

  … The green tea amino acid, L-theanine (L-THE) is associated with several health … as a supplement was compared to a control. Our findings suggest that supplementation of 200–400 mg/…

  2020221 citations

• L-theanine: a prospective natural medicine

  S Chatterjee, A Chatterjee… - International journal of …, 2016 - researchgate.net

  … information of L- theanine with reference to health benefits. … and toxicity of L-theanine (Suntheanine) where L-theanine was … a dietary supplement, and according to FDA L-theanine can …

  201618 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

  … -way crossover study in 32 healthy young adults, where we … those who use L-theanine as a nutritional supplement is yet to … Determination of the GRAS status of suntheanine L-theanine …

  202318 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-09-25. DSLD Label ID: 25543. 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.