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 Capsule(s) · 1–2 per day

Not Present

• 

  L-Theanine Pure Encapsulations

  Supplement First4.8(186)

  $65.50
• 

  Pure Encapsulations Daily Stress Formula 180 Capsules

  Pure Prescriptions4.8(37)

  $41.50
• 

  Pure Encapsulations Daily Calm 60 Capsules

  Target5.0(4)

  $50.00
• 

  Pure Encapsulations Daily Stress Formula

  Pure Prescriptions4.7(6)

  $41.50
• 

  Pure Encapsulations Daily Stress Formula 90 Capsules

  Supplement First4.8(42)

  $41.50
• 

  Best Rest Formula Pure Encapsulations

  mindbodysoul4.3(167)

  $37.00
• 

  Pure Encapsulations Anti-Stress 60 Capsules

  Cosmetic2Go4.7(35)

  $23.16
• 

  Pure Encapsulations Rapid Mental Energy 30 Capsules

  Walmart - Pattern4.2(4)

  $35.00

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.

• Suppz Nutrition Store

  4.9 (122)

  Vitamin & supplements store

  3500 Dodge St Apt 115, Dubuque, IA 52003

  Directions(563) 582-5741

• Next Level Energy

  4.8 (30)

  Vitamin & supplements store

  3345 Hillcrest Rd, Dubuque, IA 52002

  Directions(563) 451-4832

• Wittman's Nutrition Center

  5.0 (14)

  Vitamin & supplements store

  2600 Dodge St # B5, Dubuque, IA 52003

  Directions(563) 557-9067

• NUTRI-BODIES, LLC

  5.0 (5)

  Vitamin & supplements store

  14858 W Ridge Ln #4, Dubuque, IA 52003

  Directions(563) 588-4000

• GNC

  3.5 (13)

  Vitamin & supplements store

  555 John F Kennedy Rd #607, Dubuque, IA 52002

  Directions(563) 690-6742

• West End Nutrition

  4.7 (37)

  Tea store

  2255 John F Kennedy Rd Ste 600, Dubuque, IA 52002

  Directions(563) 451-0414

• Natural Grocers

  4.6 (226)

  Vitamin & supplements store

  3333 Asbury Rd, Dubuque, IA 52002

  Directions(563) 552-7152

• Select Balance

  Vitamin & supplements store

  7407 Thunder Vly Dr, Peosta, IA 52068

  Directions(563) 284-2418

• Effects of combined GABA and L-theanine supplementation on sleep quality: an exploratory study

  H Konno, K Naganuma… - … review for medical and …, 2026 - europeanreview.org

  … the use of test supplements (GABA and L-theanine) from the start of supplement intake. The … GABA 700 mg and L-theanine 200 mg; PURE Encapsulations, Nestle Health Science, Tokyo…

  2026

• An Exploratory Study to Detect the Effects of the Combined Intake of Gamma-aminobutyric Acid (GABA) and L-theanine on Sleep by Wearable Device

  H Konno, R Murotani, Y Kamada - medRxiv, 2023 - medrxiv.org

  … ) taken from the start of supplement intake. The participants took the study supplements GABA 700 mg and L-theanine 200 mg (PURE Encapsulations, Nestle Health Science, Tokyo, …

  20232 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

• Calcium alginate STB microgels co-administering L-theanine and Blautia coccoides are associated with ameliorate obesity and metabolic syndrome in mice …

  L Li, Z Huang, J Liang, Y Jin, W Peng - Chemical Engineering Journal, 2026 - Elsevier

  … evolved into a global public health crisis, often rooted in … high relative abundance in the healthy adult gut and often … is significantly lower than in healthy populations. Moreover, its …

  2026

• 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

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

  J Williams, J Kellett, PD Roach, A McKune… - 2016 - openresearch.newcastle.edu.au

  … of L-theanine uptake and metabolism in healthy participants are comparable after ingestion of L-theanine via … Effect of L-theanine on sensorimotor gating in healthy human subjects. …

  201678 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2023-06-22. DSLD Label ID: 287430. 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.