L-Theanine®

Non-Nutrient / Non-Botanical

Brand: Pure Encapsulations

CapsuleNon-Nutrient/Non-BotanicalOff Market

Product label for L-Theanine — Click to view full label

Net Contents

120 Capsule(s)

Serving Size

2 Capsule(s)

Servings Per Container

Supplement Form

Capsule

Bar Code (UPC/SKU)

7 66298 00541 6

Product Version

code: LTH1 v4

Label Analysis

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

1Active Ingredients

Single-ingredient formula listed in Supplement Facts.

100%Amount Transparency

Every active ingredient discloses a specific amount per serving.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Supplement Facts

Serving Size: 2 Capsule(s) · 1–3 per day

Ingredient	Amount Per Serving
L-Theanine	400 mg	—

Not Present

Other Ingredients

Vegetarian Capsulehypoallergenic Plant Fiber

Target Groups

Adult (18 - 50 Years)No Allergies

Label Claims

All Other

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Recommendations: As a dietary supplement, take 2 capsules, 1-3 times daily, between meals.

Warnings & Precautions

Precautions re: All Other

Tamper Resistant: Use only if safety seal is intact.

Precautions re: Pregnant or Nursing or Prescription Medications

Warning: If you are pregnant or lactating, have any health condition or are taking any medication, consult your health professional before use.

Precautions re: Children

Keep out of the reach of children.

Storage

Store sealed in a cool dry area

Formulation

Formulation re: Does NOT Contain

Commitment to Quality Program Sourced and manufactured to avoid: Artificial additives Allergens GMOs Environmental contaminants Added excipients www.PureEncapsulations.com/QualityControl See supplement facts for specific product details

Formula re: Contains

Suntheanine

Formulation re: Other

Hypoallergenic

FDA Statements

FDA Statement of Identity

Dietary Supplement

Other Label Statements

Brand IP Statement(s) re: (c), (TM), (SM)

Suntheanine is a registered trademark of Taiyo International, Inc.

General: Product/Version Code

v4 code: LTH1

Manufacturer & Distributor

Manufacturer

Pure Encapsulations, Inc.

Sudbury, MA, USA

1-800-753-2277

Market Reference

$10.00 – $107.00· 40 listings

L-Theanine Pure Encapsulations
Pure For You4.7(149)
$65.50
Pure Encapsulations - L-Theanine
EarthTurns.com4.7(149)
$65.50
Pure Encapsulations L-Theanine
mountainsidepharmacy.org/online-store4.7(149)
$107.00
Pure Encapsulations l Theanine
Waters Wellness4.7(149)
$65.50
Pure Encapsulations l-Theanine
Towncrest Pharmacy4.7(149)
$61.00
Pure Encapsulations Daily Calm 60 Capsules
Pure For You5.0(4)
$50.00
Pure Encapsulations Rapid Mental Energy 30 Capsules
Walmart - Pattern4.0(3)
$35.00
Pure Encapsulations Daily Stress Formula 90 Capsules
Pure Prescriptions4.9(58)
$41.50

Where to Buy Locally

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.

National Discount Nutrition
4.8 (75)
Vitamin & supplements store
2857 Raleigh Rd Pkwy W, Wilson, NC 27896
Directions (252) 206-1636
Nutrishop Wake Forest
5.0 (106)
Vitamin & supplements store
The Shoppes at Heritage 1040, 1040 Forestville Rd Ste 116A, Wake Forest, NC 27587
Directions (919) 570-0502
All Pro Nutrition Raleigh
4.9 (221)
Vitamin & supplements store
5910 Duraleigh Rd Ste 135, Raleigh, NC 27612
Directions (919) 781-1636
GNC
4.6 (109)
Vitamin & supplements store
1016 Shoppes At Midway Dr, Knightdale, NC 27545
Directions (919) 679-3020
The Vitamin Shoppe
4.4 (195)
Vitamin & supplements store
411 E Six Forks Rd, Raleigh, NC 27609
Directions (919) 828-8673
Bevko Vitamins
4.7 (32)
Vitamin & supplements store
6008 Creedmoor Rd, Raleigh, NC 27612
Directions (919) 676-8002
GNC
4.7 (196)
Vitamin & supplements store
11781 US Highway 70 West, Clayton, NC 27520
Directions (919) 879-8100
The Vitamin Shoppe
4.5 (80)
Vitamin & supplements store
12616 Capital Blvd Suite 200, Wake Forest, NC 27587
Directions (919) 569-0015

Research & Studies

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
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: 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. …
202525 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
Instrument-Assisted Spinal Manipulation, Soft Tissue Mobilization, and Dietary Supplements for the Management of Pain in a Woman With Fibromyalgia: A Case …
AJ McRoberts, BR Martin - Journal of Chiropractic Medicine, 2025 - jcm.kglmeridian.com
… The patient consented to having her health information … The supplements administered qd at a dosage of 2500 mg of … Deal Supplement, 200 mg of l-theanine from Pure Encapsulations (…
2025

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2019-01-07. DSLD Label ID: 184585. 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.