Natural Factors N-Acetyl-L-Cysteine 500 mg Antioxidant Support to Defend Against Polluted Environments 90 capsules (90 servings)
Analysis updated June 2026 · How Scout scores
At a glance
Summary
This supplement features N-acetyl-L-cysteine, a well-regarded antioxidant that supports detoxification and immune function. The formulation is clean with minimal additives, though it includes magnesium stearate, which is a common but sometimes criticized additive. Overall, the product maintains a high standard of ingredient quality and formulation integrity.
Key ingredients 4
N-acetyl-L-cysteineVery Good
N-acetyl-L-cysteine (NAC) is a powerful antioxidant that supports detoxification and immune function. It is well-regarded for its ability to replenish glutathione levels, a critical antioxidant in the body. NAC is often used to support respiratory health and protect against environmental pollutants.
Benefits
NAC is known for its antioxidant properties and ability to support liver detoxification and respiratory health.
Rice powderNeutral
Rice powder is used as a filler in supplements to provide bulk and ensure consistent dosing. It is a natural and minimally processed ingredient. Rice powder is generally considered safe and does not contribute significant nutritional value.
See more about Rice powder →Vegetarian capsuleNeutral
The vegetarian capsule is made from carbohydrate gum (cellulose) and purified water, providing a plant-based alternative to gelatin capsules. It is suitable for vegetarians and vegans. The capsule is designed to dissolve easily in the digestive tract.
Benefits
Provides a plant-based option for encapsulating supplements, suitable for vegetarians and vegans.
Vegetable grade magnesium stearateBad
Magnesium stearate is a common lubricant used in supplement manufacturing to prevent ingredients from sticking to equipment. It is often criticized for being a highly processed additive. While generally recognized as safe, excessive use may affect nutrient absorption.
Risks
Excessive consumption may interfere with nutrient absorption and digestive health.
Processing
Ultra-Processed Foods
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