NAC (N-Acetyl L-Cysteine), 120 Capsules
NuMedica's NAC delivers N-Acetyl L-Cysteine, a stabilized, bioavailable form of cysteine that serves as a direct precursor to glutathione, the body's primary intracellular antioxidant.
May be a fit for
- Adults seeking NAC to support glutathione production and antioxidant activity
- Individuals looking to maintain respiratory mucus clearance with N-Acetyl L-Cysteine
- Those supporting liver detoxification pathways through NAC supplementation
Save together with Wellness Circles
Invite friends or family to a Wellness Circle. Your group can unlock savings together. See current tiers and terms before joining.
Explore Wellness CirclesA closer look.
NuMedica's NAC delivers N-Acetyl L-Cysteine, a stabilized, bioavailable form of cysteine that serves as a direct precursor to glutathione, the body's primary intracellular antioxidant. It supports liver function, respiratory health, and antioxidant defenses, and is well-suited for adults seeking to maintain healthy detoxification pathways.
Why It's Worth Considering: N-Acetyl L-Cysteine is one of the more clinically studied forms of cysteine supplementation, and NuMedica formulates to professional-grade standards with an emphasis on ingredient purity and consistent dosing.
50+ signals. A clearer standard.
Our curation and trust scoring bring together manufacturing, testing, research, practitioner insight and reviews from across the web.
Our score is an editorial assessment, not a product certification or a guarantee of results.
Product details
Who it may suit
May be a fit for
- Adults seeking NAC to support glutathione production and antioxidant activity
- Individuals looking to maintain respiratory mucus clearance with N-Acetyl L-Cysteine
- Those supporting liver detoxification pathways through NAC supplementation
- Active individuals using N-Acetyl L-Cysteine to help maintain cellular defense against oxidative stress
Considerations
- Active bleeding or bleeding disorders
- Taking nitroglycerin (may cause hypotension)
- Asthma (rare cases of bronchospasm at high doses)
- Scheduled surgery within 1 week
What to expect over time
Glutathione Boost
Increased intracellular glutathione production
Liver Support
Enhanced phase II detoxification
Respiratory & Mental
Clearer breathing, reduced compulsive symptoms
Systemic Antioxidant
Reduced oxidative stress markers
Based on clinical NAC research at 600-1800mg/day.
Explore complementary products
Nordic Naturals - Vitamin C Gummies, 60 GummiesVitamin C recycles glutathione (which NAC produces) back to its active form, extending antioxidant protection.$14.99
Pure Encapsulations - Alpha Lipoic Acid 600mg, 60 CapsulesNAC produces glutathione, ALA recycles it. Together they form the core of the body's antioxidant defense network.$67.99
Thorne - Milk Thistle Phytosome (formerly Siliphos), 90 CapsulesNAC supports phase II liver detoxification while milk thistle (silymarin) protects liver cells from damage. The complete liver support stack.$48.99
NOW Foods - Selenium 200mcg, 180 CapsulesSelenium is required for glutathione peroxidase enzyme function. NAC + selenium maximizes the glutathione antioxidant pathway.$19.99Real reviews. A wider perspective.
Customer reviews, social conversations and expert insights, with every source in view.
- Marketplaces & brand websites
- Amazon, iHerb and direct brand reviews
- Social & community
- Reddit, X, Instagram and TikTok
- Video & creators
- YouTube and creator perspectives
Coverage varies by product and brand.
12869 product and brand ratings and mentions across 3 sources.
These are broader practitioner and research perspectives. They may discuss the brand or other products, rather than this exact formula.
Explore the source sentiment summary
NAC earns praise for respiratory and antioxidant benefits but draws notable complaints of agitation and worsened anxiety, producing a mixed overall reception.
This summary includes broader brand discussion. Individual experiences are not evidence of product effectiveness.
A few useful answers.
Research & further reading
More category questions
What is NAC used for?
NAC is the precursor to glutathione — the body's master antioxidant. It's used for liver detoxification, respiratory health (thins mucus), mental health (OCD, addiction, depression), immune support, and protecting against oxidative damage from toxins, alcohol, and environmental chemicals. It's also the standard ER treatment for acetaminophen overdose.
How much NAC should I take?
For general antioxidant support: 600mg 1-2x daily. For liver support: 1200-1800mg/day. For respiratory health: 600mg 2-3x daily. For mental health (OCD, addiction): 1200-2400mg/day (clinical study doses). Take on an empty stomach for best absorption.
Is NAC the same as glutathione?
No — NAC is a precursor that your body converts INTO glutathione. NAC has better oral bioavailability than direct glutathione supplements (which are largely destroyed in the stomach). NAC is generally more cost-effective for raising intracellular glutathione levels than oral glutathione, though liposomal glutathione is a viable alternative.
Can I take NAC every day?
Yes. NAC is well-tolerated for long-term daily use at standard doses (600-1800mg). It's water-soluble and excess is excreted. Common side effects are mild GI upset, which resolves by taking with food. There's no evidence of tolerance or need for cycling.
Does NAC help with hangovers?
NAC supports alcohol metabolism by boosting glutathione, which is depleted during alcohol detoxification. However, timing matters: take NAC BEFORE drinking (at least 30 minutes prior), not after. Taking NAC after alcohol may actually increase liver toxicity by interfering with the detoxification sequence.
Supplement information is provided for education and is not a substitute for personalized medical advice. Supplements are not intended to diagnose, treat, cure or prevent disease. Read the current product label before use.