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

1–2 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.

Allergen Guide

Free From

Gluten

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Supplement Facts

Serving Size: 1–2 Capsule(s) · 1 per day

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

Not Present

Other Ingredients

Vegetable CapsuleCelluloseVegetable StearateSilica

Target Groups

Children 4 or More Years of AgeAdult (18 - 50 Years)Gluten Free

Label Claims

All OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Suggested Use: Take a serving of 1-2 capsules 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.

Storage

Store in a cool dry place.

Formulation

Formulation re: Does NOT Contain

No GMO No gluten No artificial colors No preservatives

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

Seals/Symbols

U.S.A. manufactured in cGMP facility.

General Statements: All Other Content

All natural Pure energy - no crash

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

Live Optimal

Manufacturer & Distributor

Manufacturer

Natural Stacks, LLC

1603 Capitol Ave Suite #200, Cheyenne, WY, 82001

1-855-678-8857

info@naturalstacks.com

Market Reference

$11.83 – $104.85· 26 listings

Natural Stacks Smart Caffeine 60 Capsules
iHerb4.7(271)
$19.95
Natural Stacks Smart Caffeine 60 Veggie Caps
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$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
Sports Research L-Theanine & Caffeine Softgels
Target4.8(265)
$24.45
Natural Stacks Neuro Fuel 45 Veggie Caps
Instacart
$44.99
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.

GNC
3.1 (34)
Vitamin & supplements store
23032 FL-54, Lutz, FL 33549
Directions (813) 949-2559
Nutrition Smart
4.5 (681)
Vitamin & supplements store
1821 Bruce B Downs Blvd, Wesley Chapel, FL 33544
Directions (813) 341-4444
The Vitamin Shoppe
4.3 (113)
Vitamin & supplements store
28152 Willet Way, Wesley Chapel, FL 33543
Directions (813) 907-6679
Walgreens
2.4 (224)
Vitamin & supplements store
22829 FL-54, Land O' Lakes, FL 34639
Directions (813) 949-0464
NUTRISHOP NORTHDALE
4.9 (125)
Vitamin & supplements store
15722 N Dale Mabry Hwy, Tampa, FL 33618
Directions (813) 440-6885
GNC
2.9 (17)
Vitamin & supplements store
6417 E County Line Rd #103, Tampa, FL 33647
Directions (813) 948-5005
GNC
4.1 (50)
Vitamin & supplements store
6021 Wesley Grove Blvd, Wesley Chapel, FL 33544
Directions (813) 991-6677
The Vitamin Shoppe
4.6 (240)
Vitamin & supplements store
2201 E Fowler Ave A, Tampa, FL 33612
Directions (813) 615-9292

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 2016-11-21. DSLD Label ID: 66761. 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.