Theanine 100 mg®

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: 1–2 Capsule(s) · 1 per day

Not Present

• 

  Higher Nature Theanine Capsules

  W-Wellness4.5(17)

  $28.00
• 

  up&up l-Theanine 100mg Capsules

  Target3.7(12)

  $6.59
• 

  Enzymatic Therapy L-Theanine 180 Veg Capsules

  Hy-Vee4.7(313)

  $15.99
• 

  NOW L-Theanine 100mg 90 Veg Capsules

  Blue Sky Vitamin4.8(2600)

  $17.59
• 

  L-Theanine 100 mg Vegetarian Capsules

  Misty Pines Pet Company5.0(2)

  $28.99
• 

  Theanine 100mg Stress and Mood Lozenges

  Down to Earth Organic & Natural

  $20.59
• 

  Natural Factors L-Theanine Suntheanine Stress-Relax

  PureFormulas.com4.8(1100)

  $18.87
• 

  Jarrow Formulas Theanine 100 mg 60 Capsules

  Life Extension4.8(989)

  $13.49

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.

• Herbal Connection by Iron Faith Nutrition

  4.9 (19)

  Vitamin & supplements store

  1252 Lakes Blvd, Lake Park, GA 31636

  Directions(229) 559-8834

• GNC

  4.4 (81)

  Vitamin & supplements store

  680 W Duval St, Lake City, FL 32055

  Directions(386) 752-3425

• 5 Star Nutrition Valdosta (Locally Owned)

  5.0 (307)

  Vitamin & supplements store

  1761 Norman Dr #1C, Valdosta, GA 31601

  Directions(229) 539-6923

• The Vitamin Shoppe

  4.5 (254)

  Vitamin & supplements store

  1313 Apalachee Pkwy, Tallahassee, FL 32301

  Directions(850) 216-1618

• Medicine Man's Corner

  4.6 (28)

  Vitamin & supplements store

  313 Smith Ave, Thomasville, GA 31792

  Directions(229) 226-7373

• Florida Health Foods

  4.6 (58)

  Vitamin & supplements store

  7648 Lem Turner Rd, Jacksonville, FL 32208

  Directions(904) 765-2144

• GNC

  4.3 (37)

  Vitamin & supplements store

  1700 Norman Dr #1192, Valdosta, GA 31601

  Directions(229) 245-7502

• GNC

  4.0 (44)

  Vitamin & supplements store

  2135A Bemiss Rd, Valdosta, GA 31602

  Directions(229) 253-9736

• Improvement of both human and animal memory by synergy between fructooligosaccharide and L‐theanine function establishing a safe and effective food supplement

  Y Li, Y Jiang, Z Zhang, VIP Loake, X Bao… - Food science & …, 2024 - Wiley Online Library

  … of healthy adults after 1 month of consumption. Our results suggest that a combination of FOS and L-theanine … We show that this plant natural product regimen also improves human …

  202412 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

  … The green tea amino acid, L-theanine (L-THE) is associated with several health … as a supplement was compared to a control. Our findings suggest that supplementation of 200–400 mg/…

  2020225 citations

• Psychological effects of dietary components of tea: caffeine and L-theanine

  J Bryan - Nutrition reviews, 2008 - academic.oup.com

  … associated with a higher risk of ill-health among females (… of 100 mg L-theanine plus 50 mg caffeine (such as would be found in two cups of tea) were compared with the effects of 50 mg …

  2008190 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

  … healthy volunteers, after in vitro stimulation with bacterial antigens [Citation8]. In turn, addition of ethylamine to the culture of peripheral blood mononuclear cells obtained from healthy …

  201948 citations

• L-theanine: a prospective natural medicine

  S Chatterjee, A Chatterjee… - International journal of …, 2016 - researchgate.net

  … theanine with reference to health benefits. Relevant keywords like “Tea”, “L-theanine” and “health … In the US it is also sold as a dietary supplement, and according to FDA L-theanine can …

  201618 citations

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

  J Cotter, CE Caddick, JL Harper… - Nutritional …, 2026 - Taylor & Francis

  … ) that examined the effect of L-theanine (50–900 mg/day) as a standalone … supplementation with 200–450 mg/day of L-theanine appears to be a safe and effective way to support healthy …

  20269 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2015-01-23. DSLD Label ID: 41343. 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.