Theanine XR Stress Relief®

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 Vegetarian Tablet(s) · 1 per day

Not Present

• 

  Life Extension Theanine XR Stress Relief

  iHerb4.7(242)

  $21.00
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  Life Extension Enhanced Stress Relief 30 Capsules

  Life Extension4.6(432)

  $21.00
• 

  Theanine Xr Stress Relief – L-theanine – Promotes A Calm Response To

  eBay - foxyfind

  $32.95
• 

  Life Extension L-Theanine 100 mg 60 Capsules

  iHerb4.8(1300)

  $18.00
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  Theanine XR Stress Relief *

  Pure Prescriptions4.7(242)

  $28.00
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  Life Extension Rest & Renew 30 Capsules

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  Life Extension Cortisol-Stress Balance 30 Capsules

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  $34.50
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  Life Extension Ashwagandha Plus Calm & Focus

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• Supplement Warehouse

  4.7 (229)

  Vitamin & supplements store

  181 W Crossroads Pkwy Ste F, Bolingbrook, IL 60440

  Directions(630) 965-8526

• Health Nut Vitamin Inc

  4.4 (176)

  Vitamin & supplements store

  25150 Gratiot Ave, Roseville, MI 48066

  Directions(586) 778-3333

• Supplement Superstore

  5.0 (1389)

  Vitamin & supplements store

  8420 Eager Rd, St. Louis, MO 63144

  Directions(314) 961-3935

• Willner Chemists

  4.7 (146)

  Vitamin & supplements store

  100 Park Ave, New York, NY 10017

  Directions(800) 633-1106

• GNC

  4.7 (201)

  Vitamin & supplements store

  2 Pennsylvania Plaza Ste 29B, New York, NY 10121

  Directions(212) 239-1251

• The Vitamin Shoppe

  4.5 (161)

  Vitamin & supplements store

  185 US-1 S, Metuchen, NJ 08840

  Directions(732) 635-1790

• e-NutritionStore.com

  5.0 (10)

  Vitamin & supplements store

  6010 Meadowridge Center Dr K, Elkridge, MD 21075

  Directions(443) 483-3340

• SameDaySupplements.com

  4.5 (503)

  Vitamin & supplements store

  64 Nancy St Unit c, West Babylon, NY 11704

  Directions(631) 539-7339

• 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

  … The findings of the present study further support the anti-stress effects of l-theanine. … l-theanine, in addition to smaller doses of PS, alpha GPC and chamomile, subjective stress response …

  2016180 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

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

  202526 citations

• Nutrients and botanicals for treatment of stress: adrenal fatigue, neurotransmitter imbalance, anxiety, and restless sleep.

  KA Head, GS Kelly - Alternative medicine review, 2009 - go.gale.com

  … L-theanine is an amino acid extracted from green or black tea. A cup of black tea contains approximately 20 mg theanine. In the … a dual activity of theanine depending on the dose. (100) …

  2009154 citations

• How does the tea L-theanine buffer stress and anxiety

  L Wang, M Brennan, S Li, H Zhao, KW Lange… - Food Science and …, 2022 - Elsevier

  … to exert its relaxation effect. This review focuses on the relaxation effect of L-theanine, … The biological efficacy of dietary L-theanine in the food matrix has been further discussed in …

  2022103 citations

• Phytochemistry, modes of action and beneficial health applications of green tea (Camellia sinensis) in humans and animals

  M Saeed, ME Abd El-Hack, M Alagawany… - International Journal of …, 2017 - imrpress.com

  … such as L-theanine, EGCG, catechin, etc. and the useful health applications and medicinal … L theanine as feed supplementation and its potential usages in animal and poultry health as …

  201736 citations

• Understanding the broad-spectrum neuroprotective action profile of green tea polyphenols in aging and neurodegenerative diseases

  SA Mandel, T Amit, O Weinreb… - Journal of Alzheimer's …, 2011 - journals.sagepub.com

  … Also, 5 weeks oral administration of l-Theanine, an amino acid component of green tea to mice, was reported to attenuate cognitive dysfunction and neurotoxicity induced by …

  2011194 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2025-05-21. DSLD Label ID: 328727. 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.