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: 1–2 Capsule(s) · 1–3 per day

Not Present

• 

  Enzymatic Therapy L-Theanine Vegetarian Capsules

  Evergreen Nutrition

  $22.99
• 

  Enzymatic Therapy, L-Theanine, Stress, 60 VCaps - Dietary Supplement

  leder-appel.at

  $10.19
• 

  Enzymatic Therapy L-Theanine 180 Veg Capsules

  Vita Living4.7(318)

  $59.99
• 

  Nature Made Chewable L Theanine Tablets

  Walmart4.4(68)

  $12.74
• 

  up&up l-Theanine 100mg Capsules

  Target3.7(12)

  $6.59
• 

  CVS Health Ashwagandha & L-Theanine Tablets

  CVS Pharmacy4.6(102)

  $16.79
• 

  Spring Valley L-Theanine Capsules 100 mg 100 Count

  Walmart4.4(307)

  $6.43
• 

  MaryRuth's L-Theanine Liquid Drops

  Good Eggs4.8(247)

  $23.99

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.

• Philly Gainz

  4.9 (85)

  Vitamin & Supplements Shop

  6011 Ridge Ave C1, Philadelphia, PA 19128, United States

  Directions+1 215-921-1951

• The Vitamin Shoppe

  4.6 (111)

  Vitamin & Supplements Shop

  4145 William Penn Hwy, Monroeville, PA 15146, United States

  Directions+1 412-380-1493

• Coalition Nutrition

  4.9 (253)

  Vitamin & Supplements Shop

  2026 E Old Lincoln Hwy, Langhorne, PA 19047, United States

  Directions+1 267-560-2716

• Holly Hill Health Foods, Inc.

  4.7 (160)

  Vitamin & Supplements Shop

  1200 Welsh Rd Ste N, North Wales, PA 19454, United States

  Directions+1 215-361-7770

• GNC

  3.9 (32)

  Vitamin & Supplements Shop

  1728 L St NW, Washington, DC 20036, United States

  Directions+1 202-457-0097

• AdvancedSupps.com

  5.0 (90)

  Vitamin & Supplements Shop

  3872 Union Deposit Rd, Harrisburg, PA 17109, United States

  Directions+1 717-553-0500 ext. 2

• Eagle Supplements

  5.0 (3)

  Vitamin & Supplements Shop

  200 S Franklin St Unit 11, West Chester, PA 19382, United States

  Directions+1 484-459-0767

• Revelation Health

  4.4 (17)

  Vitamin & Supplements Shop

  2853 Oxford Blvd #104, Allison Park, PA 15101, United States

  Directions+1 888-600-0642

• L-Theanine: An astounding sui generis integrant in tea

  E Sharma, R Joshi, A Gulati - Food chemistry, 2018 - Elsevier

  … l-theanine (l-Th), a non-protein amino acid present in tea, is a valuable nutraceutical product with unique health benefits and used as an additive in food industry. l-Th enhances the …

  2018136 citations

• Multisystem pathology in chronic variable stress: gut–liver–brain axis disruption and the therapeutic promise of magnesium-L-theanine

  K Sahin, G Erek - Therapeutic Advances in Endocrinology …, 2026 - journals.sagepub.com

  … Magnesium-L-theanine is a nutritional compound that combines magnesium with L-theanine, a natural amino acid found in green tea. Experimental studies show that this combination …

  2026

• The Emerging Role of Citrulline and Theanine in Health and Disease: A Comprehensive Review

  X Lv, C Chen, Y Liang, Y Song, J Liu, W Chen, H Li - Nutrients, 2025 - mdpi.com

  … Among non-proteinogenic amino acids, L-citrulline and L-theanine were selected for this review due to their unique metabolic pathways, dietary availability, and growing research …

  20254 citations

• L-theanine: A potential multifaceted natural bioactive amide as health supplement

  R Adhikary, V Mandal - Asian Pacific Journal of Tropical Biomedicine, 2017 - Elsevier

  … in modern therapeutics, which are used to prepare antibiotics, growth supplements or some other therapeutics. l-theanine is such a bioactive amide amino acid presented in different …

  201778 citations

• Magnesium-L-theanine complex protects against liver and intestinal damage caused by chronic variable stress

  K Sahin, M Yabas, C Orhan, B Er, R Ozmen… - British Journal of …, 2026 - cambridge.org

  … Chronic stress can lead to serious health problems, including elevated … enzyme activity and hepatic steatosis. Here, we investigate the protective effects of the magnesium-L-theanine (…

  20261 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

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2016-03-24. DSLD Label ID: 58060. 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.