N-Acetyl-L-Cysteine 500 mg®

Non-Nutrient / Non-Botanical

Brand: Klaire Labs

CapsuleNon-Nutrient/Non-BotanicalOff Market

Product label for N-Acetyl-L-Cysteine 500 mg — Click to view full label

Net Contents

90 Vegetarian Capsule(s)

Serving Size

1 Capsule(s)

Servings Per Container

Supplement Form

Capsule

Bar Code (UPC/SKU)

8 28054 00255 5

Product Version

NAC rev210211.05

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.

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

Contains

Milk
Egg
Fish
Shellfish
Tree Nuts
Peanut
Wheat
Soy
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 Capsule(s) · 1–2 per day

Ingredient	Amount Per Serving
N-Acetyl Cysteine	500 mg	—

Not Present

Other Ingredients

Hydroxypropyl MethylcelluloseWaterMicrocrystalline CelluloseAscorbyl PalmitateSilicon Dioxide

Target Groups

Adult (18 - 50 Years)Gluten FreeDairy Free

Label Claims

All Other

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Suggested use: 1 capsule, 1 to 2 times daily or as directed by a healthcare professional. It is recommended that this product be taken with a multiple vitamin and mineral supplement.

Warnings & Precautions

Precautions re: All Other

Do not use if shrinkwrap is broken or missing.

Precautions re: Pregnant or Nursing or Prescription Medications

Caution: If you are pregnant, nursing, have a medical condition, or taking prescription drugs, consult your physician before using this product.

Precautions re: Children

Keep out of reach of children.

Storage

Store in a cool, dry place (59 degrees F - 85 degrees F) away from direct light.

Formulation

Formulation re: Does NOT Contain

Free of the following common allergens: Milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, soybeans, corn and yeast. Contains no artificial colors, flavors, or preservatives.

Formula re: Contains

N-Acetyl-L-Cysteine (NAC) is a sulfur-containing compound, thus a sulfur odor can be a normal characteristic of this product.

Formulation re: Other

Produced under a strict quality management system in compliance with Good Manufacturing Practices (GMPs) and third-party quality certifications.

FDA Statements

FDA Statement of Identity

Dietary Supplement

Other Label Statements

General Statements: All Other Content

SFI

Manufacturer & Distributor

Manufacturer

SFI USA

Reno, NV, 89521

Market Reference

$9.00 – $154.30· 26 listings

Klaire Labs SFI Health N-Acetyl-L-Cysteine
SFI Health4.8(9)
$24.99
Klaire Labs Vitalactiv 120 Capsules
Pure Prescriptions
$29.99
Carlson NAC N-Acetyl Cysteine
Vitacost.com4.8(289)
$16.58
NAC 500 N-Acetyl Cysteine
ProCaps Laboratories
$15.90
Nootropics Depot N-Acetyl L-Cysteine Capsules
Nootropics Depot4.8(18)
$16.99
Wholesome Story NAC Supplement
Thrive Market4.6(91)
$23.99
Douglas Laboratories N-Acetyl-L-Cysteine mg
Willy Street Co-op4.8(70)
$21.99
Jarrow Formulas N-A-C
PureFormulas.com4.7(282)
$9.99

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.

The Vitamin Shoppe
4.6 (154)
Vitamin & Supplements Shop
3404/06 S 144th St, Omaha, NE 68144, United States
Directions +1 402-334-0114
Supplement Superstores
5.0 (1204)
Vitamin & Supplements Shop
7344 W 135th St, Overland Park, KS 66223, United States
Directions +1 913-402-6813
No Name Nutrition Market
4.7 (164)
Vitamin & Supplements Shop
2032 N 72nd St, Omaha, NE 68134, United States
Directions +1 402-393-5812
GNC
3.8 (12)
Vitamin & Supplements Shop
8650 S 71st St c, Papillion, NE 68128, United States
Directions +1 402-592-6866
Rexius Nutrition
4.6 (22)
Vitamin & Supplements Shop
10926 Emmet St, Omaha, NE 68164, United States
Directions +1 402-214-4902
GNC
3.9 (39)
Vitamin & Supplements Shop
10000 California St #3157, Omaha, NE 68114, United States
Directions +1 402-391-6922
Rexius Nutrition Bellevue
4.6 (47)
Vitamin & Supplements Shop
4005 Twin Creek Dr #104, Bellevue, NE 68123, United States
Directions +1 402-690-6248
The Vitamin Shoppe
4.4 (66)
Vitamin & Supplements Shop
6105 E O St #1, Lincoln, NE 68510, United States
Directions +1 402-465-8294

Research & Studies

Influence of N-acetylcysteine supplementation on physical performance and laboratory biomarkers in adult males: a systematic review of controlled trials
D Fernandez-Lazaro, C Dominguez-Ortega… - Nutrients, 2023 - riubu.ubu.es
… Subsequent studies have therefore been devoted to evaluating its use in the field of physical activity and determining its efficacy as a sports supplement to improve health and …
202338 citations
N-Acetyl Cysteine
GD AZ, DI Checker, PL Tool - rxlist.com
… Healthcare providers give N-acetyl cysteine intravenously (by IV) for acetaminophen (Tylenol… If you take N-acetyl cysteine and have asthma, you should be monitored by your healthcare …
A review on various uses of N-acetyl cysteine
V Mokhtari, P Afsharian… - Cell Journal …, 2017 - pdfs.semanticscholar.org
… property, as important characteristic of this medical supplement. It has been used as a … Infertility observed in reproductive toxicity study of N-acetyl L-cysteine in rats. Biol Reprod. …
2017518 citations
Homocysteine Cardioplex
B BALANCE, S HYLAND - Omega - fullspectrumenergymedicine.com
… N-Acetyl L-Cysteine (NAC) is a free-form amino acid and … Research also suggests magnesium may support arterial health … dietary supplement or as directed by your health practitioner. …
Impact of a Glycine and N-Acetyl Cysteine Ethyl Ester Complex on Antioxidant and Inflammation Status and Related Quality of Life Parameters in Healthy Adults
GM Haase - Ann Clin Med Case Rep, 2025 - acmcasereport.org
… The study supplement employed in this investigation was Neuro-NAC™ (Nutri by Nature’s Fusions, LLC; Orem, UT). This proprietary trademarked complex provides a 2,175 …
2025
N-acetyl-L-cysteine Filters Brand
B Zone - gigasnutrition.com
… While L-cysteine is already found in the diet-mostly in lean meats-NAC is not found in the diet and must be taken as a supplement to the diet. N-acetyl cysteine is also known as NAC …

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2024-12-21. DSLD Label ID: 322413. 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.