N-Acetyl L-Cysteine (NAC)
N-Acetyl L-Cysteine (NAC)
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- Item Form
- Capsule
- Primary Supplement Type
- N-Acetyl L-Cysteine (NAC)
- Flavor
- Unflavored
- Product Benefits
- Glutathione Support, Liver Health, Respiratory Comfort, Antioxidant Defense
- Diet Type
- Gluten Free, Non-GMO
- Supplement Formulation
- Individual Supplement
- Best Taken
- With food, once or twice daily
- Manufactured In
- USA, GMP-certified facility
* 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. Consult your healthcare provider before use, especially if you are pregnant, nursing, taking medications, or have a medical condition.
NAC 600mg is the classic, well-studied starting dose -ideal for daily antioxidant support, liver health, and respiratory comfort without the intensity of higher-dose formulations.
Why It Works
Why 600mg Is the Best Starting Point for Most People
The Classic Studied Dose
The majority of published human clinical trials on NAC have used 600mg doses (taken once or twice daily). It is the dose most often cited in respiratory, liver, and antioxidant research, giving you a well-established evidence base.
Glutathione Precursor Activity
Even at 600mg, NAC meaningfully supports intracellular glutathione synthesis. NAC provides cysteine -the rate-limiting substrate for glutathione -in a form the body readily absorbs and converts.
Gentle on the Digestive System
Lower-dose NAC is typically very well tolerated. At 600mg, the vast majority of users experience no GI upset. This makes it a sensible starting point, especially for those new to NAC supplementation.
Respiratory Comfort
NAC's mucolytic properties -the ability to thin and clear mucus from airways -are active at 600mg. This supports comfortable breathing and healthy airway hygiene, particularly during respiratory stress.
Liver & Detox Support
Glutathione is central to hepatic detoxification. Daily 600mg NAC supports the liver's ability to process and neutralize unwanted compounds as part of its natural daily function.
200 Capsules -a True Long-Term Supply
With 200 capsules at 600mg, you have over 3 months at one capsule daily -or 100 days if doubling up to 1200mg/day. Consistent long-term use is what delivers the most antioxidant benefit.
Glutathione Uplift
NAC vs. Placebo: Measured Glutathione Response
NAC is absorbed intact and converted intracellularly, raising glutathione where it is actually needed. Oral glutathione supplements are largely broken down before reaching cells. Even at 600mg–1200mg/day, NAC shows a documented glutathione uplift in published RCT data.
0%
17%
38%
Change in intracellular glutathione from baseline
*Approximate values; 600mg taken twice daily approximates the ~1200mg/day dose shown in published research. Individual results vary.
Your Journey
What to Expect Over 3 Months
Foundation
Month 1
In the first 2–3 weeks at 600mg daily, most people notice improved respiratory clarity and a subtle but real sense of antioxidant support during stressful periods. The liver begins benefiting from steadily rising glutathione availability.
At this dose, tolerance is typically excellent -a good window to confirm your body responds well before considering a higher dose.
Better Together
Combines Well With
Stack with these for a complete protocol, formulated to work synergistically.
Got Questions?
Frequently Asked Questions
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