🟢 100/100

This product looks safe

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

Product Label

📸

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Label Data

600 mg Serving Size
188 Servings
Non-Nutrient/Non-Botanical Product Type
100% Evidence Coverage

Supplement Facts — Evidence Check

📊 Market median: 600.0mg (7 products) 📚 39 studies (Tier A: 2, B: 13)
This product: 600mg

Other Ingredients

None

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (96% of products) Structure/Function (81% of products) Nutrient (19% of products) No Claim (3% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free Dairy Free

Product Information

📋 Directions for Use

Suggested usage: Take 1/4 level teaspoon 1 to 3 times daily. Due to the strong taste of this powder, we recommend it be mixed with acidic type juice, such as orange or cranberry.

⚠️ Warnings & Precautions

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

Consult a physician if pregnant/nursing, taking medication (especially nitroglycerin), or have a medical condition.

Do not eat freshness packet 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 promotes the formation of glutathione. Glutathione is a powerful free radical scavenging compound that also helps to maintain normal balanced immune system function. In addition, NAC can help to support healthy brain and neuronal tissues.

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

Free radical protection Maintains cellular health Normal immune system function

Non-GMO

Amino acids

Packaged and quality tested in the USA.

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

Additional Information

Keep freshness packet in bottle until it is empty. Keep bottle tightly closed at all times in between usage.

Family owned since 1968.

This product is sold by weight not volume.

Store in a cool, dry place after opening.

GMP Quality Assured

Product Details

UPC / SKU 7 33739 00186 3
DSLD Entry Date 2023-06-22
Product Type Non-Nutrient/Non-Botanical
Form Powder
Brand NOW
DSLD ID 292055
Data Updated 2026-04-11

Research Evidence

41 Research Sources
51 Avg Quality Score
19 Rct
13 Meta Analysis
9 Clinical Trial
B N-acetylcysteine as an adjuvant therapy for Helicobacter pylori eradication
Meta Analysis The Cochrane database of systematic reviews 2019
B Effect of high-dose N-acetylcysteine on exacerbations and lung function in patients with mild-to-moderate COPD: a double-blind, parallel group, multicentre randomised clinical trial
Rct Nature communications 2024
B N-acetylcysteine for non-paracetamol (acetaminophen)-related acute liver failure
Meta Analysis The Cochrane database of systematic reviews 2020
B Influence of N-acetylcysteine on chronic bronchitis or COPD exacerbations: a meta-analysis
Meta Analysis European respiratory review : an official journal of the European Respiratory Society 2015
B A randomised controlled trial of a mitochondrial therapeutic target for bipolar depression: mitochondrial agents, N-acetylcysteine, and placebo
Rct BMC medicine 2019
B Efficacy of N-acetylcysteine for patients with depression: An updated systematic review and meta-analysis
Meta Analysis General hospital psychiatry 2024
B Cysteine, cystine or N-acetylcysteine supplementation in parenterally fed neonates
Meta Analysis The Cochrane database of systematic reviews 2006
B N-acetylcysteine as an adjunctive treatment for bipolar depression: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Bipolar disorders 2021
B N-acetylcysteine as an adjunctive treatment for bipolar depression and major depressive disorder: a systematic review and meta-analysis of double-blind, randomized placebo-controlled trials
Meta Analysis Psychopharmacology 2020
B N-acetylcysteine Treatment in Chronic Obstructive Pulmonary Disease (COPD) and Chronic Bronchitis/Pre-COPD: Distinct Meta-analyses
Meta Analysis Archivos de bronconeumologia 2024
View all evidence for Nac →

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