Smart Caffeine with L-Theanine®

Non-Nutrient / Non-Botanical

Brand: NS Natural Stacks

CapsuleNon-Nutrient/Non-BotanicalOn Market

Functions

Brain & Cognition Energy & Metabolism

Product label for Smart Caffeine with L-Theanine — Click to view full label

Net Contents

60 Vegetarian Capsule(s)

Serving Size

1–6 Capsule(s)

Servings Per Container

Supplement Form

Capsule

Bar Code (UPC/SKU)

7 98295 45253 5

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.

2Active Ingredients

2 distinct active ingredients are disclosed in Supplement Facts.

100%Amount Transparency

Every active ingredient discloses a specific amount per serving.

1Dietary Attributes

Label states: Gluten-Free.

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: 1–6 Capsule(s) · 1 per day

Ingredient	Amount Per Serving
L-Theanine	200 mg	—
Caffeine(Green Coffee)	100 mg	—

Not Present

Other Ingredients

HypromelloseSilicaMicrocrystalline CelluloseAscorbyl Palmitate

Target Groups

Children 4 or More Years of AgeAdult (18 - 50 Years)Women (not pregnant or lactating)Gluten Free

Label Claims

All OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Suggested Use: Take 1 capsule whenever focused energy is desired. Avoid use in the evening. Do not take more than 6 capsules per day.

Warnings & Precautions

Precautions re: Children

Warning: Do not use if pregnant, nursing, or under the age of 12.

Precautions re: Pregnant or Nursing or Prescription Medications

Warning: Do not use if pregnant, nursing, or under the age of 12. Consult with a healthcare practitioner before taking this or any nutritional supplement if you have or suspect a medical condition, are taking any medications, or other non-Natural Stacks dietary supplements.

Precautions re: All Other

Do not use if safety seal is broken or missing.

Precautions re: Children

Keep out of reach of children.

Precautions re: All Other

Do not take more than 6 capsules per day.

Storage

Store in a cool dry place.

Formulation

Formulation re: Other

Pure energy more focus No crash

Formulation re: Other

3rd Party Lab Tested

Formulation re: Does NOT Contain

Ingredients Naturally Free of: Gluten, dairy, soy.

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

Certified Open Source: Scan for ingredient supplier information and 3rd party lab test results.

Seals/Symbols

Certified Open Source Full Label Disclosure U.S.A. manufactured in a cGMP certified facility.

Manufacturer & Distributor

Manufacturer

NS 360, Inc.

4241 24th Ave W, Seattle, WA, 98199

1-855-678-2257

info@naturalstacks.com

Market Reference

$11.83 – $104.85· 24 listings

Natural Stacks Smart Caffeine 60 Capsules
iHerb4.7(271)
$19.95
Natural Stacks Smart Caffeine 60 Veggie Caps
Home & Well4.6(69)
$21.00
NaturalStacks.com NEUROFUEL Nootropic Smart Caffeine Stack
Natural Stacks4.9(76)
$50.91
Nutricost Caffeine + L-Theanine Capsules
Target4.7(927)
$13.95
Natural Stacks Neuro Fuel
Walmart - Natural Stacks4.8(644)
$23.70
Natural Stacks Neuro Fuel 45 Veggie Caps
Instacart
$44.99
Sports Research L-Theanine & Caffeine Softgels
Target4.8(265)
$24.45
Wilderness Athlete Energy Focus Tub
Wilderness Athlete4.5(15)
$49.95

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.

The Vitamin Shoppe
4.5 (143)
Vitamin & supplements store
NW corner of 55th & 8th, 931 8th Ave, New York, NY 10019
Directions (212) 582-8965
GNC
4.7 (197)
Vitamin & supplements store
2 Pennsylvania Plaza Ste 29B, New York, NY 10121
Directions (212) 239-1251
GNC
4.4 (88)
Vitamin & supplements store
753 Broadway Spc 753, New York, NY 10003
Directions (212) 380-5999
The Vitamin Shoppe
4.3 (163)
Vitamin & supplements store
385 5th Ave, New York, NY 10016
Directions (212) 532-4534
GNC
3.8 (63)
Vitamin & supplements store
600 8th Ave, New York, NY 10018
Directions (212) 768-7468
The Vitamin Shoppe
4.4 (98)
Vitamin & supplements store
257 8th Ave, New York, NY 10011
Directions (212) 243-0086
GNC
4.0 (145)
Vitamin & supplements store
1755 Broadway, New York, NY 10019
Directions (212) 247-2309
The Vitamin Shoppe
4.3 (70)
Vitamin & supplements store
2086-A Broadway, New York, NY 10023
Directions (212) 580-7620

Research & Studies

A Standardized Single Dose of the Nootropic CILTEP® Has No Effect on Cognitive Performance in Healthy Elderly Participants
N Possemis, S Caldenhove, J Prickaerts… - Journal of Cognitive …, 2025 - Springer
… of caffeine, l-theanine, vinpocetine, l-tyrosine, and vitamins B6 and B12 (CAF +). In healthy … a requirement of the sponsor of this study (Natural Stacks™). Also, the standardized dose is …
2025
Anti-stress, behavioural and magnetoencephalography effects of an L-theanine-based nutrient drink: a randomised, double-blind, placebo-controlled …
DJ White, S De Klerk, W Woods, S Gondalia, C Noonan… - Nutrients, 2016 - mdpi.com
… with caffeine administration (250 mg). Haskell et al. [26] also studied l-theanine and caffeine … support of cognitive or mood effects of l-theanine in isolation. The combined treatment was …
2016177 citations
L-Theanine Nootropic Review: Benefits, Side Effects & Dosage
HMDLT Cost - nootropicology.com
… Taking L-Theanine alongside caffeine has significantly enhanced my focus and calmness. The combination provides a smooth energy boost without the jitters typically associated with …
The effect of green tea amino acid L-theanine formulation on markers of stress and quality of sleep (THESleep project)–a study protocol for a pilot randomised control …
A Bulman, A McKune, E Georgousopoulou… - Contemporary Clinical …, 2026 - Elsevier
… Theanine maintains sleep quality in healthy young women by suppressing the increase in caffeine-induced wakefulness after sleep onset [10.1039/D3FO01247F]. Food & Function, …
2026
Living the Raw Live Vegan Lifestyle: Finally Eat More and Lose More Weight with Optimal Nutrition!
SE Rubarth - 2012 - books.google.com
… half the caffeine of coffee. Its L‑theanine neutralizes the harmful side effects of caffeine and is … So I will buy that pineapple, which is not grown in Nova Scotia, and enjoy it! Fruits contain a …
20121 citations
Electronic sensor technologies in monitoring quality of tea: A review
SMT Gharibzahedi, FJ Barba, J Zhou, M Wang… - Biosensors, 2022 - mdpi.com
… [12] also determined this health effect in green tea, due to the presence of the main component of amino acids, namely L-theanine. Ma et al. [13] recently found that black tea …
202273 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2022-09-22. DSLD Label ID: 274259. 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.