Theanine

Suggested Use

Suggested Use:As a dietary supplement; take 1-2 servings daily. Always consult your physician before taking supplements.

• 

  Life Extension L-Theanine 100 mg 60 Capsules

  Natures Food Markets4.8(1200)

  $15.59
• 

  Life Extension Theanine XR Stress Relief

  Life Extension4.7(236)

  $21.00
• 

  Nature Made Chewable L Theanine Tablets

  Target4.4(59)

  $15.79
• 

  Spring Valley L-Theanine Capsules 100 mg 100 Count

  Walmart4.4(296)

  $6.43
• 

  the Vitamin Shoppe L-THEANINE 200 MG 120 EA

  The Vitamin Shoppe4.2(12)

  $44.99
• 

  up&up l-Theanine 100mg Capsules

  Target3.7(12)

  $6.59
• 

  Walgreens L-Theanine 200 mg Capsules (60 ct)

  Walgreens.com4.0(4)

  $14.99
• 

  Nutricost L-Theanine Capsules

  Walmart4.8(6900)

  $5.88Lowest

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.

• 5 Star Nutrition Stafford

  4.9 (257)

  Vitamin & supplements store

  325 Garrisonville Rd #103, Stafford, VA 22554

  Directions(540) 300-8688

• GNC

  4.1 (39)

  Vitamin & supplements store

  1465 Stafford Market Pl Ste B1.1, Stafford, VA 22556

  Directions(540) 720-1779

• The Vitamin Shoppe

  4.1 (144)

  Vitamin & supplements store

  1471 Carl D Silver Pkwy, Fredericksburg, VA 22401

  Directions(540) 548-2295

• Start 2 Finish Nutrition

  4.9 (139)

  Vitamin & supplements store

  1261 Carl D Silver Pkwy #106, Fredericksburg, VA 22401

  Directions(540) 548-1700

• Manassas Nutrition Corner

  4.8 (82)

  Vitamin & supplements store

  9825 Liberia Ave Unit 105, Manassas, VA 20110

  Directions(571) 719-3321

• 5 Star Nutrition Woodbridge

  4.9 (154)

  Vitamin & supplements store

  2816 Prince William Pkwy, Woodbridge, VA 22192

  Directions(571) 285-4153

• GNC

  4.5 (2)

  Vitamin & supplements store

  3500 Russell Rd Bldg 3500, Quantico, VA 22134

  Directions(703) 221-9632

• The Vitamin Shoppe

  4.2 (162)

  Vitamin & supplements store

  14065 Shoppers Best Way, Woodbridge, VA 22192

  Directions(703) 583-1479

• Kiperin Mind Focus supplement mitigates chronic stress–induced neuroinflammation and molecular dysregulation and improves stress-related affective and …

  L Karcioglu Batur, C Yavas, A Kilic, T Dogan… - Frontiers in Integrative …, 2025 - frontiersin.org

  … potential of L-theanine, a key component of the combined formulation, although we cannot disentangle the contribution of each component L-theanine has been shown to regulate …

  2025

• Tea and its active ingredients in preventing and alleviating depression: A comprehensive review

  S Xiao, Y Li, H Jiang, S Hou, Y Wang, D Wang, J Teng - Foods, 2025 - mdpi.com

  … green tea intake and self-reported lifelong depression among 9576 adults. The findings … of L-theanine, suggesting that L-theanine may have a positive impact on the mental health of the …

  20258 citations

• The effect of L-theanine supplementation on the immune system of athletes exposed to strenuous physical exercise

  A Juszkiewicz, A Glapa, P Basta… - Journal of the …, 2019 - Taylor & Francis

  … Th1 caused by supplementation with theanine, which would be consistent with our research hypothesis. Published evidence suggests that supplementation with theanine may influence …

  201948 citations

• T-Shirt

  MS Stephen Sheehan, J Quintal - 1stphorm.com

  … As a certified personal trainer and lifelong athlete, I’ll be the … L-theanine is a unique amino acid found in green tea that’s … A 2024 study on collegiate archers found that L-theanine …

• Comparative analysis of anti-obesity effects of green, fermented, and γ-aminobutyric acid teas in a high-fat diet-induced mouse model

  SJ Lee, KH Cho, JC Kim, HJ Choo, JY Hwang… - Applied Biological …, 2024 - Springer

  … high levels of theanine, caffeine, and GABA. These compounds are noted in the literature for their potential benefits in weight management and metabolic health [33]. Theanine, an …

  202410 citations

• Effects of matcha green tea powder on cognitive functions of community-dwelling elderly individuals

  K Sakurai, C Shen, Y Ezaki, N Inamura, Y Fukushima… - Nutrients, 2020 - mdpi.com

  … higher amount of tea theanine contained inside Matcha green … may lead to much more health benefits. Besides, because of the … However, the “Umami” taste derived from theanine inside …

  202078 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-05-24. DSLD Label ID: 21717. 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.