Antioxidant & Longevity · Immune · Liver & Detox
NAC – 90 servings
✓90-DAY MONEY-BACK GUARANTEE
$29.99$0.33 PER SERVING
NAC is a stable form of cysteine, the amino acid your body uses to make glutathione — its own primary antioxidant. This is 600 mg of free-form N-Acetyl-L-Cysteine in a single daily capsule, the exact amount printed on the label with no proprietary blend. Ninety capsules, and a certificate of analysis published for every lot.*
Supports glutathione production
Supports antioxidant defenses
Supports respiratory wellness
Supports normal detoxification
The amount is on the label
Tested, and the results are public
THIRD-PARTY TESTEDcGMP FACILITYVEGAN CAPSULENON-GMOCOA PER LOTGLUTEN-FREE
How to take
Adults take 1 capsule daily, preferably between meals, or as directed by a healthcare professional.. Consistency matters more than timing — pick a moment you'll remember daily.
Consult a healthcare professional before use if pregnant or nursing, taking medication (especially nitroglycerin), or if you have a medical condition. Keep out of reach of children.
Consult a healthcare professional before use if pregnant or nursing, taking medication (especially nitroglycerin), or if you have a medical condition. Keep out of reach of children.
Quality & testing
Manufactured in the USA in a cGMP-certified facility. Raw materials are tested and qualified before use, and every finished batch is verified by an independent lab for identity, potency, heavy metals, and microbials. Results publish on this page per lot.
Shipping & subscription
Subscribe at any frequency — every month, every 2 months or every 3 months — and save 10%. Subscribe to a second product and every subscription goes to 20%. Free shipping on subscriptions, and you can pause, skip or cancel anytime from your account — no phone calls, no hoops.
What it supports
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Supports glutathione production
NAC supplies cysteine, the building block your body uses to make glutathione, its own primary antioxidant.
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Supports antioxidant defenses
Helps protect your cells from the everyday oxidative stress they are exposed to.
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Supports respiratory wellness
NAC has long been used to support normal respiratory and lung function.
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Supports normal detoxification
Supports the body's normal detoxification pathways, including in the liver.
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The amount is on the label
600 mg of free-form N-Acetyl-L-Cysteine per capsule, with no proprietary blend.
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Tested, and the results are public
Every lot is independently tested for identity, potency, heavy metals and microbials, with the certificate published.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
600 mg, free-form, disclosed.
N-Acetyl-L-Cysteine (free-form) 600 mg
| NAC 600 mg | Practitioner-brand NAC | Mass-market NAC | |
|---|---|---|---|
| Free-form NAC per capsule | 600 mg | 600 mg | Varies |
| Exact amount on the label | ● | ● | Varies |
| No proprietary blend | ● | ● | Varies |
| 90 capsules per bottle | ● | Varies | Varies |
| COA published every lot | ● | — | — |
GENERAL FORM COMPARISON — INDIVIDUAL PRODUCTS VARY BY BRAND
What's happening
while you wait.
*INDIVIDUAL RESULTS VARY. THESE STATEMENTS HAVE NOT BEEN EVALUATED BY THE FDA.
Inside the formula
N-Acetyl-L-Cysteine (free-form) 600 mg
NAC — N-Acetyl-L-Cysteine — is a stable form of the amino acid cysteine, and cysteine is the rate-limiting building block your body uses to make glutathione, its own primary antioxidant. Supplying the precursor is the reason NAC is taken at all. Each capsule delivers 600 mg of the free-form amino acid, the exact amount printed on the label with nothing hidden behind a blend, and every lot carries a published certificate of analysis.
Frequently asked
questions
How do I know what's on the label is in the bottle?
Trust should be verifiable. Every batch we produce is tested by an independent laboratory, and the certificate of analysis for your exact lot is published on this page — potency, heavy metals, microbials. Testing begins the moment a raw material arrives, continues through production, and no batch is released until every result clears. The label is a claim. The COA is the proof.
How do you choose your ingredients and doses?
We formulate from peer-reviewed clinical research and dose to match it. We select the highest-grade material available for each ingredient, in the form the body absorbs best, and where a patented or branded form is the one that has actually been studied, that is the one we use. Every active appears at its exact amount, with no proprietary blends and nothing added that doesn't need to be there.
Where are CoreLabs supplements made?
In our own cGMP-certified facility in California's Central Valley. Manufacturing in-house means quality is our responsibility at every step rather than a supplier's promise. Raw materials are purchased through established US suppliers who import and qualify them, and every material is tested against our own specification before it enters production — wherever it originated.
Why are CoreLabs supplements more expensive?
Because of what goes in. We buy the highest grade of each raw material, in the most absorbable form, and we work with the branded and patented ingredient houses whose material the clinical research was actually run on — names like Lonza, Albion, RIBUS, Sabinsa and Indena. Wherever possible those materials are made domestically. Our capsules are titanium-dioxide free. Then it is made in our own facility and third-party tested batch by batch. Every one of those choices costs more than the alternative, and the price reflects it. Anyone can claim quality — we publish ours.
What does NAC actually do?
NAC supplies cysteine, the building block your body uses to make glutathione — one of its most important internal antioxidants. It has also long been used to support respiratory wellness and normal detoxification.
Why is it called free-form?
Free-form means the amino acid is not bound to anything else, so the 600 mg on the label is 600 mg of N-Acetyl-L-Cysteine rather than 600 mg of a complex containing some smaller amount of it.
When should I take it?
One capsule daily, preferably between meals.
Can I take more than one?
The label serving is one capsule daily. NAC is commonly taken at higher daily amounts under professional guidance, so speak to a healthcare professional before going beyond the label.