L-Theanine®

Other Combinations

Brand: Dr. Berg

CapsuleOther CombinationsOn 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

Supplement Form

Capsule

Bar Code (UPC/SKU)

Not specified

Product Version

Not Present

Label Analysis

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

5Active Ingredients

5 distinct active ingredients are disclosed in Supplement Facts.

100%Amount Transparency

Label includes a proprietary blend, so some individual amounts are not itemized.

3% Daily Value Coverage

3 ingredients report a %DV; 1 meet or exceed 100% DV.

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: 1 Capsule(s) · 3 per day

Ingredient	Amount Per Serving	% Daily Value
Zinc(Zinc Amino Acid Chelate)	0.4 mg	4%
Copper(Copper Amino Acid Chelate)	0.03 mg	3%
Manganese(Manganese Lactate)	3 mg	130%
L-Theanine	200 mg	—
Proprietary Blend	385 mg	—
L-Tyrosine	—	—
Ashwagandha, Powder	—	—
Bovine Adrenal Substance, Desiccated	—	—
Nutritional Yeast	—	—
Licorice, Powder	—	—

Not Present

Other Ingredients

GelatinMicrocrystalline CelluloseMagnesium Stearate

Target Groups

Adult (18 - 50 Years)

Label Claims

NutrientAll OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

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

Warnings & Precautions

Precautions re: All Other

Caution: Do not exceed recommended dose. Do not use if safety seal is damaged or missing.

Precautions re: Pregnant or Nursing or Prescription Medications

Pregnant or nursing mothers, children under the age of 18, and individuals with known medical conditions should consult a physician before using this or any dietary supplement.

Precautions re: Children

Pregnant or nursing mothers, children under the age of 18, and individuals with known medical conditions should consult a physician before using this or any dietary supplement.

Storage

Store in a cool, dry place, with a lid.

Formulation

Formulation re: Other

Adrenal support

Formula re: Contains

L-theanine + L-tyrosine + Ashwagandha + Desiccated adrenal

FDA Statements

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

FDA Statement of Identity

Dietary Supplement

Other Label Statements

General Statements: All Other Content

To reorder: shop.drberg.com

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

Dr. Berg The Knowledge Doc

Manufacturer & Distributor

Manufacturer

Dr. Berg Nutritionals

4501 Ford Avenue, Alexandria, VA, 22302

800-816-8184

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.