L-Theanine

Non-Nutrient / Non-Botanical

Brand: Pure Encapsulations

CapsuleOff Market

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

Net Contents

60 Capsule(s)

Serving Size

2 Capsule(s)

Servings Per Container

Not specified

Supplement Form

Capsule

Bar Code (UPC/SKU)

7 66298 00542 3

Product Version

Not specified

Suggested Use

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

Market Reference

$10.00 – $115.00· 40 listings

L-Theanine Pure Encapsulations
Pure For You4.7(149)
$65.50
Pure Encapsulations l-Theanine
Harrison Pharmacy & Wellness4.7(149)
$61.00
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
L-Theanine by Pure Encapsulations
Cincinnati Health Institute4.7(149)
$115.00
Pure Encapsulations Daily Calm 60 Capsules
Pure For You5.0(4)
$50.00
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.

GNC
4.5 (11)
Vitamin & supplements store
2111 Queen Anne Ave N Ste 101, Seattle, WA 98109
Directions (206) 395-7842
Vital Nutritionals
5.0 (1)
Vitamin & supplements store
4031 Aurora Ave N STE 100, Seattle, WA 98103
Directions (206) 268-0473
The Vitamin Shoppe
4.4 (140)
Vitamin & supplements store
13500 Aurora Ave N, Seattle, WA 98133
Directions (206) 365-5240
City Supplements
4.6 (87)
Vitamin & supplements store
70 Andover Park W, Tukwila, WA 98188
Directions (206) 556-2155
Natuspur
Vitamin & supplements store
2334 Elliott Ave, Seattle, WA 98121
Directions (833) 628-8778
Pike Place Nutrition
2.9 (12)
Health food store
1501 LL# 416, Seattle, WA 98101
Directions (206) 623-2231
NATURAL STACKS
3.0 (4)
Vitamin & supplements store
4241 24th Ave W, Seattle, WA 98199
Directions (855) 678-2257
The Vitamin Shoppe
4.3 (171)
Vitamin & supplements store
14733 NE 8th St, Bellevue, WA 98007
Directions (425) 957-0787

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
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
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
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
… Though many of the included studies were conducted using healthy adults in Japan, beneficial effects of L-theanine on sleep related-measures were also reported in randomised, …
20269 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: 293999. 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.