L-Theanine

Other Combinations

Brand: Dr. Berg

CapsuleOn Market

Functions

Sleep, Mood & Stress

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

Net Contents

90 Capsule(s)

Serving Size

1 Capsule(s)

Servings Per Container

Not specified

Supplement Form

Capsule

Bar Code (UPC/SKU)

Not specified

Product Version

Not specified

Suggested Use

Suggested use: As a dietary supplement; take 1 capsule; with meals; 3 times per day.

Market Reference

$6.59 – $127.50· 40 listings

Dr. Berg L-Theanine Supplement
Dr. Berg's Store4.3(1000)
$22.99
Dr. Berg Adrenal & Cortisol Support 60 Vegetable Capsules
Dr. Berg's Store4.7(1500)
$36.99
Dr. Berg Sleep Aid Regular Formula 90 Capsules
Dr. Berg's Store4.4(1200)
$41.99
up&up l-Theanine 100mg Capsules
Target3.7(12)
$6.59Lowest
MaryRuth's L-Theanine Liquid Drops
The Vitamin Shoppe4.8(223)
$22.99
Nootropics Depot L-Theanine Capsules
Nootropics Depot4.5(15)
$44.99
The Original
EMP Merchandising
$37.41
L-Theanine 200 mg Quick Release Capsules
Walmart - PIPING ROCK HEALTH PRODUCTS, LLC
$16.49

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.

Supplement Superstore
5.0 (30)
Vitamin & supplements store
10035 S Memorial Dr Suite 30, Tulsa, OK 74133
Directions (918) 248-0925
Supplement World
5.0 (197)
Vitamin & supplements store
8206 E 71st St, Tulsa, OK 74133
Directions (918) 936-3512
The Vitamin Shoppe
4.4 (149)
Vitamin & supplements store
8247 E 71st St, Tulsa, OK 74133
Directions (918) 307-2212
GNC
3.7 (38)
Vitamin & supplements store
7335 S Olympia Ave, Tulsa, OK 74132
Directions (918) 447-1555
Discount Sport Nutrition
4.0 (95)
Vitamin & supplements store
6636 S Memorial Dr, Tulsa, OK 74133
Directions (918) 249-0099
Prime Time Nutrition
4.6 (71)
Grocery store
6829 S Peoria Ave, Tulsa, OK 74136
Directions (918) 878-7895
Akin's Natural Foods
4.6 (320)
Vitamin & supplements store
7807 E 51st St, Tulsa, OK 74145
Directions (918) 663-4137
GNC
4.4 (45)
Vitamin & supplements store
8115 E 71st St, Tulsa, OK 74133
Directions (918) 728-8381

Research & Studies

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 benefits, including improvements in mood, cognition and a reduction of stress and anxiety-like symptoms…
2020225 citations
Dietary protocols to promote and improve restful sleep: a narrative review
F Conti - Nutrition reviews, 2026 - academic.oup.com
… alert following treatment with L-theanine and placebo.Given that L-theanine achieves its … these findings effectively ruled out the possibility of L-theanine– related daytime drowsiness …
202610 citations
A Randomized, Triple-Blind, Placebo-Controlled, Crossover Study to Investigate the Efficacy of a Single Dose of AlphaWave®l-Theanine on Stress in a Healthy Adult …
M Evans, AC McDonald, L Xiong, DC Crowley… - Neurology and …, 2021 - Springer
… supplement to reduce it. This study investigated the effectiveness and safety of AlphaWave ® l-Theanine on brainwaves and salivary cortisol in healthy… mg of AlphaWave ® l-Theanine or …
202146 citations
NooCube Review (2024): An over-priced, under-powered nootropic
P Tardner - 2020 - ijest.org
… The supplement is manufactured by Wolfson Berg … The supplement contains ingredients such as L-Theanine and Tyrosine that are believed to improve focus and attention. L-Theanine …
2020
l-Theanine inhibits melanoma cell growth and migration via regulating expression of the clock gene BMAL1
R Zhang, S Zheng, Z Guo, Y Wang, G Yang… - European journal of …, 2022 - Springer
… It has been well documented that the most important effect of l-theanine is to promote sleep … , l-theanine does not cause drowsiness during the day [27]. We notice that l-theanine can …
202222 citations
Keep moving, this is not the page you are looking for.
T Mitchell - supremepundit.com
… The L-theanine didn’t cause the subjects to sleep longer, but it did cause them to sleep … feelings were all enhanced by L-theanine. Those taking L-theanine felt like they slept longer than …

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2025-07-24. DSLD Label ID: 337162. 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.