Pure L-Theanine™

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: 0.25 Gram(s) · 1–3 per day

Based on 2,000 calorie diet

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  Micro Ingredients Pure L-Theanine Powder

  Micro Ingredients3.8(54)

  $24.95
• 

  Micro Ingredients L-Theanine Softgels

  Micro Ingredients4.7(9)

  $24.95
• 

  100g/200g Micro Ingredients L-Theanine Daily Supplements essence extra Powder Filler Free Non-GMO Soy free 99% Pure

  Etsy - Seller

  $30.25
• 

  L-Theanine Pure Encapsulations

  Supplement First4.7(149)

  $65.50
• 

  Micro Ingredients Softgels

  iHerb4.9(18)

  $26.99
• 

  up&up l-Theanine 100mg Capsules

  Target3.7(12)

  $6.59
• 

  The Vitamin Shoppe L-Theanine

  The Vitamin Shoppe4.7(31)

  $19.99
• 

  Theanine L-Theanine Amino Acid Powder

  Prescribed For Life

  $54.99

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.

• G2 Supplements + Water

  4.8 (62)

  Vitamin & supplements store

  3236 N Tracy Blvd, Tracy, CA 95376

  Directions(209) 815-1139

• Artesian Health Foods

  4.5 (40)

  Vitamin & supplements store

  2251 Grant Line Rd #125, Tracy, CA 95377

  Directions(209) 836-0190

• Prime Time Nutrition

  4.2 (12)

  Nutritionist

  71 10th St, Tracy, CA 95376

  Directions(209) 830-4410

• Nature's Corner

  5.0 (41)

  Vitamin & supplements store

  1237 W Yosemite Ave, Manteca, CA 95337

  Directions(209) 239-5355

• GNC

  4.8 (49)

  Vitamin & supplements store

  4225 First St, Livermore, CA 94551

  Directions(925) 606-9506

• Valley Health Mill

  4.8 (26)

  Vitamin & supplements store

  1989 Santa Rita Rd Ste C, Pleasanton, CA 94566

  Directions(925) 462-9354

• Green's Nutrition

  4.6 (169)

  Health food store

  1906 Pacific Ave, Stockton, CA 95204

  Directions(209) 464-5738

• Ocean-Flo Life International

  5.0 (5)

  Vitamin & supplements store

  1373 Maehl Dr, Manteca, CA 95337

  Directions(661) 379-7280

• Effect of L-theanine on selective attention in a traffic-related reaction task in sleep-deprived young adults: a double-blind placebo-controlled, crossover study

  UW Karunaratne, TL Dassanayake - Nutritional neuroscience, 2025 - Taylor & Francis

  … L-theanine improves neurobehavioral measures of visual attention in acutely sleep-deprived healthy … The doses were measured using a digital micro-scale having a sensitivity of 1 mg. …

  20256 citations

• The impact of Ārepa, a blackcurrant-based nootropic drink, on neurocognitive function

  JR Miller - researchspace.auckland.ac.nz

  … lower daily dose of L-theanine (100.6mg) … L-theanine supplementation among healthy participants have demonstrated a more consistent cognitive benefit. In particular, acute Ltheanine …

• Tea and digestive system health: integrating gut microbiota-involved ADME and personalized nutrition for gastrointestinal disorders intervention

  R Yue, Y Wen, S Zhao, X Liu, L Luo, Y Liu… - Critical Reviews in …, 2026 - Taylor & Francis

  2026

• Traditional Brain-Boosting Foods Available in Global Markets

  E Kilic, R Bayrak, AB Bilgin, P Basaran - Brain Foods - api.taylorfrancis.com

  … amounts provide health benefits to the host. Their administration restores gut microbiota, … Their benefits extend beyond gastrointestinal health, as they are increasingly recognized for …

• Super Sleep: A Circadian Resynchronisation Formula Based on Multi-Mechanism Non-Sedative Sleep Architecture Support—Formulation Rationale, Target …

  S Samarin - escapeprotocol.com

  … Estimated €35 billion annually in the EU from lost productivity and healthcare costs; US … L-theanine increases alpha brain wave power — the 8–14 Hz frequency associated with …

  1 citations

• Mixed processing improved the theaflavin, theanine and aroma components of Congou black tea

  H Zuo, Z Lv, S Guo, Y Zhou… - International Journal of …, 2024 - academic.oup.com

  Congou black tea is mainly processed from single variety leaves, with obvious variety characteristics. This study investigated the effects of mixed processing withered leaves varieties on …

  20249 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2020-08-23. DSLD Label ID: 231763. 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.