N-Acetyl-L-Cysteine
Scored by the Formulate Research Team · Last reviewed July 2026
Score Breakdown
Three factors carry this score; three more are checked separately and can only take points away. Hover or tap to see what drove each one.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| N-Acetyl Cysteine | 600 mg |
Certifications & Testing
Other Ingredients
Cellulose, Stearate, Silica
Recommended Use
Directions: Take one (1) capsule one to three times daily, or as recommended by a healthcare practitioner.
Warnings
Read the entire label and follow the directions carefully. Warnings: Keep out of reach of children. Do not exceed recommended dose. Do not purchase if outer seal is damaged. Consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating. To report a serious adverse event or obtain product information, contact 1-866-280-2852.
Frequently Asked Questions
What is Life Extension N-Acetyl-L-Cysteine's Formulate score?
Life Extension N-Acetyl-L-Cysteine scores 94 out of 100 (grade A) on Formulate's ingredient-level rubric: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
Is Life Extension N-Acetyl-L-Cysteine worth it?
Life Extension N-Acetyl-L-Cysteine scores 94/100 (grade A). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Life Extension N-Acetyl-L-Cysteine?
Each serving contains N-Acetyl Cysteine (600 mg). Serving size: 1 Capsule(s). 60 servings per container.
How do I take n-acetyl-l-cysteine?
Directions: Take one (1) capsule one to three times daily, or as recommended by a healthcare practitioner.
Who makes N-Acetyl-L-Cysteine?
N-Acetyl-L-Cysteine is made by Life Extension. See Formulate's full grade and product lineup for Life Extension on its brand page.
Is Life Extension N-Acetyl-L-Cysteine third-party tested?
Life Extension lists the following certifications and testing for this product: Gluten free Non GMO LE Certified, Gluten-Free.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.