L-Theanine With Suntheanine 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.

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 Veggie Capsule(s) · 1 per day

Not Present

• 

  Doctor's Best Suntheanine L-Theanine 150 mg 90 Veggie CapsDoctor's Best Suntheanine L-Theanine 150 mg 90 Veggie Caps

  iHerbFree delivery on $25+Free delivery on $25+

  $22.99Lowest
• 

  Doctor's Best Suntheanine L-Theanine Vegetable CapsulesDoctor's Best Suntheanine L-Theanine Vegetable Capsules

  Texim OneFree delivery on $100+Free delivery on $100+

  $26.99
• 

  Doctor's Best L-Theanine AlphaWave Veggie CapsDoctor's Best L-Theanine AlphaWave Veggie Caps

  superbhb.co.ukFree deliveryFree delivery

  $26.77
• 

  BestVite L-Theanine 200mg with SuntheanineBestVite L-Theanine 200mg with Suntheanine

  BestviteFree deliveryFree delivery

  $32.99
• 

  Theanine (as Suntheanine) 60 CapsulesTheanine (as Suntheanine) 60 Capsules

  Nutriessential.comFree delivery on $75+Free delivery on $75+

  $37.80

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.

• GNC

  4.5 (128)

  Vitamin & supplements store

  432 86th St, Brooklyn, NY 11209

  Directions(718) 680-0901

• The Vitamin Shoppe

  4.3 (142)

  Vitamin & supplements store

  1326 Kings Hwy, Brooklyn, NY 11229

  Directions(718) 382-2535

• 4life Brooklyn

  5.0 (5)

  Vitamin & supplements store

  New Utrecht Ave, Brooklyn, NY 11219

  Directions(347) 825-1330

• Natural Body Bay Ridge

  5.0 (37)

  Vitamin & supplements store

  8806 4th Ave, Brooklyn, NY 11209

  Directions(347) 578-7764

• The Vitamin Shoppe

  4.5 (61)

  Vitamin & supplements store

  480 86th St, Brooklyn, NY 11209

  Directions(718) 491-9768

• GNC

  4.5 (53)

  Vitamin & supplements store

  2155 A Ralph Ave, Brooklyn, NY 11234

  Directions(347) 875-4578

• GNC

  4.2 (115)

  Vitamin & supplements store

  5301 5th Ave, Brooklyn, NY 11220

  Directions(718) 439-7954

• The Vitamin Shoppe

  4.4 (122)

  Vitamin & supplements store

  8929 Avenue D C1, Brooklyn, NY 11236

  Directions(718) 629-2076

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

  J Williams, J Kellett, P Roach, A McKune… - …, 2016 - pureportal.coventry.ac.uk

  … 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 …

  201677 citations

• 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

• 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/…

  2020225 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 …

  202316 citations

• The Effect of Tea and its Constituent L-Theanine on Anxiety: A Review of the Literature

  C Gilbert - 2014 - digitalcommons.calpoly.edu

  … Due to anxiety’s high prevalence and health consequences, more clinical trials using … 50 or 200 mg of Suntheanine, a commercial product for L-theanine. Suntheanine was prepared by …

  20142 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2017-12-22. DSLD Label ID: 81908. 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.