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NAC 600 mg

product on market Capsule NOW Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · grounded in 1 source · methodology

N-Acetyl Cysteine and selenium are researched for their roles in supporting antioxidant defenses and glutathione production. There is strong evidence for NAC's role in respiratory and hepatic health, while selenium acts as a critical cofactor for antioxidant enzymes. Overall, these ingredients are well-tolerated and maintain a high safety profile.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for NAC 600 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
250
Servings
Other Combinations
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

25 mcg (45% DV)
Within RDA (0.5× RDA) 173 studies (A:0, B:67)
Market median: 600.0mg (7 products) 39 studies (A:2, B:13)

Other Ingredients

Hypromellose Stearic Acid Citric Acid Microcrystalline Cellulose
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested Usage: Take 1 capsule twice daily.

Warnings & Precautions

Caution: For adults only. Keep out of reach of children.

Consult physician if pregnant/nursing, taking medication, or have a medical condition.

Do not eat freshness packets enclosed.

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Formulation Notes

N-acetyl cysteine (NAC) is a stable form of the non-essential amino acid cysteine. It is a sulfur-containing amino acid that acts as a stabilizer for the formation of protein structures, and is also necessary for the formation of glutathione. Selenium is an essential trace mineral that facilitates the production of several important enzymes.

Natural color variation may occur in this product when exposed to air. Speckling in capsule may occur but does not affect product quality. Speckling in capsule may occur but does not affect product quality. Free radical protection

Maintains cellular health with selenium

Non-GMO

Triangle K (Kosher)

Made and quality tested in the USA with globally sourced ingredients.

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients.

Crescent H (Halal)

Additional Information

Triangle K (Kosher)

Amino acids Family owned since 1968.

Keep freshness packets in bottle until it is empty. Keep bottle tightly closed at all times in between usage. Store in a cool, dry place after opening.

Crescent H (Halal) GMP Quality Assured

Metadata

Product Details

UPC / SKU7 33739 00086 6
DSLD Entry Date2024-06-20
Product TypeOther Combinations
FormCapsule
BrandNOW
DSLD ID313864
Data Updated2026-04-11
Research

Research Evidence

273
Research Sources
55
Avg Quality
131
Meta Analysis
61
Systematic Review
55
Rct
19
Clinical Trial
2
Regulatory Source
1
Cochrane Review
1
Other
1
Observational
1
Openfda Safety
A Selenium for preventing cancer
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Selenium supplementation for the primary prevention of cardiovascular disease
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Selenium supplementation for critically ill adults
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin E and the risk of prostate cancer: the Selenium and Vitamin E Cancer Prevention Trial (SELECT)
Rct JAMA 2011 PubMed DOI
B Selenium and prostate cancer: systematic review and meta-analysis
Meta Analysis The American journal of clinical nutrition 2012 PubMed DOI
B Selenium supplementation for Hashimoto's thyroiditis
Systematic Review The Cochrane database of systematic reviews 2013 PubMed DOI
B Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy
Meta Analysis The Cochrane database of systematic reviews 2017 PubMed DOI
B Selenium, antioxidants, cardiovascular disease, and all-cause mortality: a systematic review and meta-analysis of randomized controlled trials
Meta Analysis The American journal of clinical nutrition 2020 PubMed DOI
B The effect of selenium supplementation on coronary heart disease: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) 2017 PubMed DOI
B Meta-analysis of selenium effects on the meat quality of broilers
Meta Analysis Poultry science 2024 PubMed DOI
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.