Theanine™

Non-Nutrient / Non-Botanical

Brand: LiveLong

PowderNon-Nutrient/Non-BotanicalOff Market

Product label for Theanine — Click to view full label

Net Contents

50 Gram(s)

Serving Size

0.25 tsp

Servings Per Container

100

Supplement Form

Powder

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.

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: 0.25 tsp · 1–2 per day

Ingredient	Amount Per Serving
L-Theanine	500 mg	—

Percent Daily Values are based on a 2,000 calorie diet

Other Ingredients

None

Target Groups

Adult (18 - 50 Years)

Label Claims

All OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take 1-2 servings daily. Always consult your physician before taking supplements.

Warnings & Precautions

Precautions re: Children

WARNING: KEEP OUT OF REACH OF CHILDREN.

Precautions re: All Other

Consult your physician before using this dietary supplement. Do not use this product if you are at risk or are being treated for high blood pressure, heart, kidney, thyroid, or psychiatric disease, difficulty in urinating, prostate enlargement, anxiety, depression, seizure disorder, or stroke.

Precautions re: Pregnant or Nursing or Prescription Medications

Consult your healthcare professional before use if you are taking antidepressants, MAO inhibitors, or any other prescription drugs.

Precautions re: All Other

Discontinue use and consult your healthcare professional if dizziness, sleeplessness, tremors, nervousness, headache or heart palpitations occur. Consult your healthcare practitioner before beginning any weight loss program.

FDA Statements

FDA Disclaimer Statement

These statements have not been evaluated by the FDA. 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

Theanine is a molecule similar to Glutamic Acid, and is found in Green Tea, although in small amounts. Pure Theanine causes a noticable sense of calm in users and increases dopamine, which is the reward chemical found in the brain. Theanine has also been shown to increase alpha waves, which is responsible for relaxed and calming thoughts. Take the edge off a stressful day, or promote a long-term strategy for stress reduction, by including Theanine in your daily regimen.

General Statements: All Other Content

- Stress Reduction - Powerful Anti-Oxidant - Raise Dopamine Levels

Manufacturer & Distributor

Manufacturer

LIVELONG NUTRITION(TM)

Piedmont, SC, 29673

Market Reference

$6.43 – $419.99· 40 listings

Life Extension L-Theanine 100 mg 60 Capsules
iHerb4.8(1300)
$18.00
Nature Made Chewable L Theanine Tablets
Target4.4(68)
$16.59
Life Extension Theanine XR Stress Relief
Life Extension4.7(242)
$21.00
Nootropics Depot L-Theanine Capsules
Nootropics Depot4.5(15)
$15.99
CVS Health Ashwagandha & L-Theanine Tablets
CVS Pharmacy4.6(102)
$16.79
Now Foods L-Theanine Double Strength 200 mg
NOW4.7(6600)
$25.99
Spring Valley L-Theanine Capsules 100 mg 100 Count
Walmart4.4(307)
$6.43Lowest
L-Theanine 200
Bock Nutritionals
$52.99

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.

Willner Chemists
4.7 (146)
Vitamin & supplements store
100 Park Ave, New York, NY 10017
Directions (800) 633-1106
e-NutritionStore.com
5.0 (10)
Vitamin & supplements store
6010 Meadowridge Center Dr K, Elkridge, MD 21075
Directions (443) 483-3340
Cymbiotika LLC
4.7 (345)
Vitamin & supplements store
5825 Oberlin Dr #5, San Diego, CA 92121
Directions (855) 983-8888
LEAN Nutraceuticals, Inc.
5.0 (1)
Vitamin & supplements store
902 S Randall Rd #300c, St. Charles, IL 60174
Directions (855) 382-4296
ThyNatural
Vitamin & supplements store
11755 Wilshire Blvd #1250, Los Angeles, CA 90025
Directions (800) 592-1321
Swanson Health Products
3.2 (90)
Warehouse
4075 40th Ave S, Fargo, ND 58104
Directions (800) 824-4491
Tiger Fitness
4.1 (70)
Vitamin & supplements store
113 Commerce Dr, Loveland, OH 45140
Directions (877) 397-3801
Nutters Everyday Naturals
4.3 (65)
Vitamin & supplements store
1601 Dunmore Rd SE, Medicine Hat, AB T1A 1Z8, Canada
Directions +1 403-529-1664

Research & Studies

Impairment between oxidant and antioxidant systems: Short-and long-term implications for athletes' health
C Nocella, V Cammisotto, F Pigozzi, P Borrione… - Nutrients, 2019 - mdpi.com
… impacting on individuals’ lifelong health. Diet, environmental … radicals and to provide many health benefits, it is also known … , but supplementation with L-theanine, the main amino acid …
2019124 citations
Tea and its active ingredients in preventing and alleviating depression: A comprehensive review
S Xiao, Y Li, H Jiang, S Hou, Y Wang, D Wang, J Teng - Foods, 2025 - mdpi.com
… green tea intake and self-reported lifelong depression among 9576 adults. The findings … of L-theanine, suggesting that L-theanine may have a positive impact on the mental health of the …
202510 citations
The effect of L-theanine supplementation on the immune system of athletes exposed to strenuous physical exercise
A Juszkiewicz, A Glapa, P Basta… - Journal of the …, 2019 - Taylor & Francis
… Th1 caused by supplementation with theanine, which would be consistent with our research hypothesis. Published evidence suggests that supplementation with theanine may influence …
201948 citations
Effects of matcha green tea powder on cognitive functions of community-dwelling elderly individuals
K Sakurai, C Shen, Y Ezaki, N Inamura, Y Fukushima… - Nutrients, 2020 - mdpi.com
… higher amount of tea theanine contained inside Matcha green … may lead to much more health benefits. Besides, because of the … However, the “Umami” taste derived from theanine inside …
202081 citations
Best Nootropic Supplements for Focus in 2026
K Andrews - noobru.com
Most" best nootropics" lists rank supplements by vague quality scores or brand reputation—which tells you nothing about when you'll actually feel a difference. This guide takes a …
Tea and cognitive health in late life: current evidence and future directions
J Song, H Xu, F Liu, L Feng - The Journal of nutrition, health and aging, 2012 - Elsevier
… could be due to catechins, L-theanine and other compounds in tea leaves. … and L-theanine could be collected in future studies. … In such study, detailed information on lifelong tea intake (…
201278 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-05-24. DSLD Label ID: 21717. 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.