MegaFood NAC N-Acetyl Cysteine, 120 Capsules supplement bottle
MegaFood

NAC N-Acetyl Cysteine, 120 Capsules

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 8 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
100
Product Score Excellent
89
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
N-Acetyl-L-Cysteine (NAC) 600 mg *
Bioavailability Excellent

Absorption Rating

  • N-Acetyl-L-Cysteine (NAC) Good
Other Ingredients Excellent

Fillers & Additives

  • Hypromellose
  • Stearic Acid
  • Silicon Dioxide
  • Microcrystalline Cellulose
Efficacy Excellent

Dosage Analysis

  • N-Acetyl-L-Cysteine (NAC) 600 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
N-Acetyl-L-Cysteine (NAC) 600 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$32$31$30$29$28 Mar 12 $29.99
Vitacost

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
MegaFood

Founded 1973 · Manchester, New Hampshire, United States · 125 products · megafood.com

Certifications

8 certifications
B Corp Certified Verified Source
Gluten Free Gfco Verified Source
Non Gmo Project Verified Source
Nsf Certified For Sport Verified Source
Nsf Gmp Verified Source
Vegan Certified Verified Source
Fda Gmp Inspections Verified Source
Usda Organic Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed Source
In House Testing — Verified Source

Violation History

1 incident
Lawsuit Misleadingly labeling products as '100% whole food' when they allegedly contained synthetic ingredients.2019Source
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Frequently Asked Questions
Is MegaFood NAC N-Acetyl Cysteine, 120 Capsules a good supplement?

MegaFood NAC N-Acetyl Cysteine, 120 Capsules received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 120 servings per container. All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, MegaFood, holds a brand trust score of 89/100 with 8 verified certifications including B Corp Certified, Gluten Free Gfco, Non Gmo Project, Nsf Certified For Sport.

What are the ingredients in MegaFood NAC N-Acetyl Cysteine, 120 Capsules?

MegaFood NAC N-Acetyl Cysteine, 120 Capsules contains 1 active ingredients: N-Acetyl-L-Cysteine (NAC) (600 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is MegaFood NAC N-Acetyl Cysteine, 120 Capsules safe to take?

MegaFood NAC N-Acetyl Cysteine, 120 Capsules has been analyzed for ingredient safety across all its components. All 4 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is MegaFood a trustworthy supplement brand?

MegaFood receives a brand trust score of 89/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1973 and headquartered in Manchester, New Hampshire, United States, the company offers 125 products in their lineup. They hold 8 verified certifications including B Corp Certified, Gluten Free Gfco, Non Gmo Project, Nsf Certified For Sport. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: MegaFood has 1 historical regulatory incident on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.