N-Acetyl Cysteine®

Other Combinations

Brand: Source Naturals

Tablet or PillOther CombinationsOff Market

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

Net Contents

120 Tablet(s)

Serving Size

1 Tablet(s)

Servings Per Container

120

Supplement Form

Tablet or Pill

Bar Code (UPC/SKU)

0 21078 00170 6

Product Version

SN0170 REV C203-A FG-106328

Label Analysis

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

3Active Ingredients

3 distinct active ingredients are disclosed in Supplement Facts.

100%Amount Transparency

Every active ingredient discloses a specific amount per serving.

1% Daily Value Coverage

1 ingredients report an established %DV per serving.

2Dietary Attributes

Label states: Non-GMO, 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
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 Tablet(s) · 1–2 per day

Ingredient	Amount Per Serving	% Daily Value
Calories	5 Calorie(s)	—
Calcium(Dibasic Calcium Phosphate)	59 mg	4%
N-Acetyl Cysteine	1 Gram(s)	—

Not Present

Other Ingredients

Dibasic Calcium PhosphateStearic AcidHydroxypropyl Cellulosemodified Cellulose GumSilicaMagnesium Stearate

Target Groups

Adult (18 - 50 Years)Gluten FreeDairy FreeSugar Free

Label Claims

All OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Suggested Use: 1 tablet 1 to 2 times daily.

Warnings & Precautions

Precautions re: Pregnant or Nursing or Prescription Medications

Warning: Do not use if you are taking any form of prescription nitrate such as nitroglycerin. If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.

Precautions re: All Other

Do not use if either tamper-evident seal is broken or missing.

Precautions re: Children

Keep out of the reach of children.

Storage

Keep tightly closed in a cool, dry place.

Formulation

Formulation re: Other

Antioxidant support

Formulation re: Does NOT Contain

Non-GMO Validated

Formula re: Contains

N-acetyl cysteine is a more stable form of the sulfur amino acid L-cysteine, and is a powerful cysteine and glutathione precursor. Glutathione is a major antioxidant as the cofactor for glutathione peroxidase, one of the most important antioxidant enzymes in the body. Additionally, a meta-analysis of human clinical trials has reported that N-acetyl cysteine supplementation supports respiratory health.

Formulation re: Does NOT Contain

Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, preservatives, or artificial color, flavor or fragrance.

FDA Statements

FDA Statement of Identity

Dietary Supplement

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.

Other Label Statements

Seals/Symbols

Non-GMO Validated

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

Manufacturer & Distributor

Distributor

Source Naturals, Inc.

P. O. Box 2118, Santa Cruz, CA, 95062

Market Reference

$6.59 – $104.20· 40 listings

Source Naturals N Acetyl Cysteine
Vitacost.com4.7(798)
$10.74
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Chinese Herbs Direct4.8(27)
$6.59Lowest
Source Naturals Wellness N A Cetin Immune Protocol
Walmart - Health Chest4.7(37)
$18.25
Nutricost N-Acetyl L-Cysteine Capsules
Target4.7(3400)
$12.95
Source Naturals Skin Eternal 60 Tablets
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$11.85
Wholesome Story NAC Supplement
Thrive Market4.6(91)
$23.99
MegaFood NAC Supplement
MegaFood.com4.2(8)
$24.99
the Vitamin Shoppe Nac N-Acetyl-l-Cysteine Promotes Health
The Vitamin Shoppe4.6(314)
$34.99

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.

Fitness Society Supplements
5.0 (44)
Vitamin & supplements store
7501 Mentor Ave, Mentor, OH 44060
Directions (440) 855-7983
National Nutrition
4.8 (1265)
Vitamin & supplements store
5 Progress Dr, Orillia, ON L3V 0T7, Canada
Directions (800) 526-9772
NutraBio Labs Inc
4.9 (173)
Vitamin & supplements store
600 Lincoln Blvd, Middlesex, NJ 08846
Directions (888) 688-7224
Nutriessential
2.0 (16)
Vitamin & supplements store
5880 Collins Ave, Miami Beach, FL 33140
Directions (786) 623-4117
GNC
4.4 (92)
Vitamin & supplements store
753 Broadway Spc 753, New York, NY 10003
Directions (212) 380-5999
Green Organic Supplements Online
3.9 (7)
Health consultant
11 Second Ave, Brentwood, NY 11717
Directions (844) 289-4736
Procaps Laboratories
4.1 (68)
Vitamin & supplements store
430 Parkson Rd, Henderson, NV 89011
Directions (888) 888-2876
Celebrate Vitamins
4.9 (528)
Vitamin & supplements store
516 Corporate Pkwy, Wadsworth, OH 44281
Directions (877) 424-1953

Research & Studies

Medical and dietary uses of N-acetylcysteine
Š Šalamon, B Kramar, TP Marolt, B Poljšak, I Milisav - Antioxidants, 2019 - mdpi.com
… N-acetylcysteine (also known as N-acetyl-cysteine, NAC) is a precursor to the amino … supplements [14,15]. However, we were unable to find a review of both medical and supplementary …
2019219 citations
l-Cysteine
B Sameem, F Khan, K Niaz - … and nonmineral nutritional supplements, 2019 - Elsevier
… n-acetyl-cysteine also known as n-acetyl-l-cysteine, and is the synthetic precursor form of cysteine … as a supplement especially if an individual has existing health concerns. All drugs and …
201930 citations
N‐acetylcysteine: a review of clinical usefulness (an old drug with new tricks)
GK Schwalfenberg - Journal of nutrition and metabolism, 2021 - Wiley Online Library
… N-acetylcysteine may otherwise be called N-acetyl-L-cysteine, NAC, or NALC. Trade names for … that cysteine deficiency as we age is responsible for loss of youth and loss of health and …
2021220 citations
N-Acetylcysteine (NAC): Impacts on Human Health
MCS Tenório, NG Graciliano, FA Moura, ACM Oliveira… - Antioxidants, 2021 - mdpi.com
… Its pathogenesis is already well understood and involves toxic effects on the liver due to the excessive production of N-acetyl-p-benzo-quinone imine (NAPQI), which is a hepatotoxic …
2021634 citations
Unraveling origins of N-Acetylcysteine (NAC): a critical review
AG Osman, B Avula, IA Khan… - … of Dietary Supplements, 2025 - Taylor & Francis
… indication of NAC or other N-acetyl amino acid derivatives. To this end, it can be concluded that if the Allium genomes do not contain a gene or genes coding for N-acetyl transferases, N-…
20251 citations
A review on various uses of N-acetyl cysteine
V Mokhtari, P Afsharian… - Cell Journal …, 2017 - pdfs.semanticscholar.org
Abstract N-acetyl cysteine (NAC), as a nutritional supplement, is a greatly applied antioxidant in vivo and in vitro. NAC is a precursor of L-cysteine that results in glutathione elevation …
2017518 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: 272434. 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.