L-Theanine 250 mgnone

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) · 1–2 per day

Not Present

• 

  Arazo Nutrition L-Theanine 250mg Extra Strength Inositol 100mg 120 Capsules

  eBay - auromoon

  $23.99
• 

  Arazo Nutrition L-theanine 250mg (extra Strength) Inositol 100mg,120

  eBay - ampalace

  $17.50
• 

  Source Naturals Theanine Serene with Relora - 60 Tablets

  Life Extension4.7(831)

  $15.74Lowest
• 

  AOR Zen Theanine

  Caforia4.5(46)

  $33.00

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• The Vitamin Shoppe

  4.6 (181)

  Vitamin & supplements store

  27310 W Lugonia Ave C1, Redlands, CA 92374

  Directions(909) 793-9520

• GNC

  4.2 (34)

  Vitamin & supplements store

  10080 Alabama St Pad "A, Redlands, CA 92374

  Directions(909) 792-5040

• Wholesale Nutrition Center

  5.0 (95)

  Vitamin & supplements store

  3427 Arlington Ave, Riverside, CA 92506

  Directions(951) 289-9033

• Garcia's Healthy Supplements

  4.6 (53)

  Vitamin & supplements store

  1455 W Highland Ave Ste 109, San Bernardino, CA 92411

  Directions(909) 887-6500

• House Of Nutrition

  4.9 (28)

  Vitamin & supplements store

  17284 Foothill Blvd E, Fontana, CA 92335

  Directions(909) 938-1551

• The Vitamin Shoppe

  4.5 (141)

  Vitamin & supplements store

  3660 Central Ave, Riverside, CA 92506

  Directions(951) 684-4970

• GNC

  3.8 (32)

  Vitamin & supplements store

  1420 S Riverside Ave Ste 8F, Rialto, CA 92376

  Directions(909) 258-2738

• Octane Sport Nutrition

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  Store

  34428 Yucaipa Blvd # F, Yucaipa, CA 92399

  Directions(909) 790-0600

• The effects of L-theanine supplementation on the outcomes of patients with mental disorders: a systematic review

  R Moshfeghinia, E Sanaei, S Mostafavi, K Assadian… - BMC psychiatry, 2024 - Springer

  … effects of LT supplementation on the outcomes of patients with mental health disorders. The … Furthermore, Ota and colleagues noted that the daily administration of 250 mg of LT over a …

  202425 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

  … l-theanine (250 mg) alone was associated with elevated … benefits to mood and general health, l-theanine is emerging as an … research, daily supplementation with 300–400 mg of PS over …

  2016180 citations

• Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials

  J Cotter, CE Caddick, JL Harper… - Nutritional …, 2025 - Taylor & Francis

  … Though many of the included studies were conducted using healthy adults in Japan, beneficial effects of L-theanine on sleep related-measures were also reported in randomised, …

  20259 citations

• l-theanine: From tea leaf to trending supplement–does the science match the hype for brain health and relaxation?

  R Dashwood, F Visioli - Nutrition Research, 2025 - Elsevier

  … of this nutraceutical supplement marketed for brain health and … in the use of l-theanine supplements at pharmacologic doses … this trending supplement for brain health and relaxation. …

  202526 citations

• Effect of a combination of magnesium, B vitamins, Rhodiola, and green tea (L-theanine) on chronically stressed healthy individuals—A randomized, placebo …

  L Noah, V Morel, C Bertin, E Pouteau, N Macian… - Nutrients, 2022 - mdpi.com

  … trials evaluating the effect of dietary supplements in healthy individuals who report stress. … the dietary supplement Mg-Teadiola versus a placebo in stressed, healthy individuals scoring …

  202241 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2019-07-24. DSLD Label ID: 205228. 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.