L-Theanine 100 mg

Suggested Use

Directions: Adults - Take one capsule daily with food as a dietary supplement.

• 

  Spring Valley L-Theanine Capsules 100 mg 100 Count

  Walmart4.4(296)

  $6.43Lowest
• 

  up&up l-Theanine 100mg Capsules

  Target3.7(12)

  $6.59
• 

  The Vitamin Shoppe L-Theanine

  The Vitamin Shoppe4.7(31)

  $19.99
• 

  Now Foods L-Theanine 100mg Chewables

  DPS Nutrition4.7(727)

  $12.99
• 

  L-Theanine 100 mg Vegetarian Capsules

  TheBetterHealthStore.com5.0(2)

  $15.99
• 

  NOW L-Theanine 100mg 90 Veg Capsules

  Highland Health Foods4.8(2600)

  $17.59
• 

  Enzymatic Therapy L-Theanine 180 Veg Capsules

  Life Extension4.7(313)

  $17.24
• 

  L-Theanine 100mg

  Keystone Compounding Pharmacy

  $30.82

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.

• Nutrishop Tupelo

  5.0 (138)

  Vitamin & supplements store

  115 N Thomas St Ste h, Tupelo, MS 38801

  Directions(662) 610-4546

• GNC

  3.3 (34)

  Vitamin & supplements store

  1001 Barnes Crossing Rd Box 91, Tupelo, MS 38804

  Directions(662) 841-9360

• Whole Family Nutrition & Market

  4.7 (106)

  Health food store

  1798 N Gloster St, Tupelo, MS 38804

  Directions(662) 691-8522

• Nature Pharmacy

  4.8 (19)

  Vitamin & supplements store

  shopping center, 1168 W Main St, Tupelo, MS 38801

  Directions(662) 844-9700

• Walgreens

  3.2 (112)

  Vitamin & supplements store

  817 W Main St, Tupelo, MS 38801

  Directions(662) 620-7959

• Healthy Habits

  4.0 (10)

  Health food store

  shopping center, 1168 W Main St, Tupelo, MS 38801

  Directions(662) 844-9700

• CVS

  2.8 (82)

  Vitamin & supplements store

  702 W Main St, Tupelo, MS 38804

  Directions(662) 840-4818

• Walgreens

  3.0 (71)

  Vitamin & supplements store

  834 Barnes Crossing Rd, Tupelo, MS 38804

  Directions(662) 840-8462

• L-theanine as a functional food additive: Its role in disease prevention and health promotion

  J Williams, J Kellett, P Roach, A McKune… - …, 2016 - pureportal.coventry.ac.uk

  … (DAD) or anion exchange chromatography and electrokinetic … the ingestion of a combined 100 mg L-THE and 50 mg caffeine [61]. … , a supplementation regimen with L-THE (280 mg) and …

  201677 citations

• The effects of green tea amino acid L-theanine consumption on the ability to manage stress and anxiety levels: a systematic review

  JL Williams, JM Everett, NM D'Cunha, D Sergi… - Plant foods for human …, 2020 - Springer

  … , L-theanine (L-THE) is associated with several health benefits, … Our findings suggest that supplementation of 200–400 mg/… Articles were not selected prior to 1990 due to the difficulty in …

  2020225 citations

• The effect of green tea amino acid L-theanine formulation on markers of stress and quality of sleep (THESleep project)–a study protocol for a pilot randomised control …

  A Bulman, A McKune, E Georgousopoulou… - Contemporary Clinical …, 2026 - Elsevier

  … questionnaire and general health questionnaire to determine if … For future studies it may be beneficial for participants to return … on sleep: a systematic review of dietary supplementation …

  2026

• The beneficial health effects of green tea amino acid l‐theanine in animal models: Promises and prospects for human trials

  J Williams, D Sergi, AJ McKune… - Phytotherapy …, 2019 - Wiley Online Library

  … Supplementation regimens in mice have also shown that l-THE at a dose of 80 mg/kg and cysteine (200 mg/kg) … This study provided evidence that l-THE (10–100 mg/kg/day) attenuated …

  201982 citations

• L‐Theanine: properties, synthesis and isolation from tea

  QV Vuong, MC Bowyer… - … of the Science of Food and …, 2011 - Wiley Online Library

  … a perceived demand for L-theanine as a supplement or food ingredient.… a combination of 100 mg L-theanine and 50 mg caffeine … isotachophoretic anion-exchange chromatography with …

  2011318 citations

• 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

  … on the outcomes of patients with mental health disorders. … treatment [6, 7], 400 mg/day (100 mg × 2 times/day, 2 tablets/time) … for schizophrenia appears to be 400 mg/day administered in …

  202423 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2017-08-22. DSLD Label ID: 76815. 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.