Metabolic Nutrition NAC, 90 Capsules (650 mg per Capsule) supplement bottle
Metabolic Nutrition

NAC, 90 Capsules (650 mg per Capsule) Review

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · Page generated: Sep 2026
100
Product Score Excellent
63
Brand Score Fair

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
NAC (N-Acetyl L-Cysteine) 650 mg 0%
Bioavailability Excellent

Absorption Rating

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

Fillers & Additives

  • Mcc
  • Magnesium Stearate
  • Silicon Dioxide
Efficacy Excellent

Dosage Analysis

  • NAC (N-Acetyl L-Cysteine) 650 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
NAC (N-Acetyl L-Cysteine) 650 mg 0%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Mcc Unknown
Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Brand Trust Report
Metabolic Nutrition

Founded 1987 · Tamarac, Florida, United States · 151 products · metabolicnutrition.com/

Transparency

3 claims
In House Testing — Verified Evidence available Evidence
Third Party Testing Claim — True Brand claim; evidence unavailable

Violation History

1 incident
Fda Warning Products Synedrex and E.S.P. Extreme were found to contain 2-aminoisoheptane (DMHA), an ingredient that the FDA considers to be a new dietary ingredient for which a New Dietary Ingredient notification is required and has not been submitted. The FDA stated that in the absence of such a notification, the products were considered adulterated.2019-04-10 Source available Primary source
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Frequently Asked Questions
Is Metabolic Nutrition NAC, 90 Capsules (650 mg per Capsule) a good supplement?

Metabolic Nutrition NAC, 90 Capsules (650 mg per Capsule) 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 90 servings per container. Of the 3 inactive ingredients, 2 are rated safe and 0 ingredients are flagged for review. The manufacturer, Metabolic Nutrition, holds a brand trust score of 63/100.

What are the ingredients in Metabolic Nutrition NAC, 90 Capsules (650 mg per Capsule)?

Metabolic Nutrition NAC, 90 Capsules (650 mg per Capsule) contains 1 active ingredients: NAC (N-Acetyl L-Cysteine) (650 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Metabolic Nutrition NAC, 90 Capsules (650 mg per Capsule) safe to take?

GoodSupp reviewed the inactive-ingredient data available for Metabolic Nutrition NAC, 90 Capsules (650 mg per Capsule). This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Metabolic Nutrition a trustworthy supplement brand?

Metabolic Nutrition receives a brand trust score of 63/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1987 and headquartered in Tamarac, Florida, United States, the company offers 151 products in their lineup. Note: Metabolic Nutrition 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 — read our methodology. 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.