NAC 600 mg by Integrative Therapeutics

If you’re dealing with thick mucus from seasonal colds or chronic congestion, NAC 600 mg is the over-the-counter option most people try first for mucus thinning. It also fits adults focused on liver wellness, especially if liver enzymes like ALT or AST (signals of liver cell irritation) or GGT (an enzyme linked to oxidative stress) have run high in the past. If your Omega-3 Index and Vitamin D, 25-Hydroxy are dialed in but energy and recovery still lag, NAC can be the next lever for glutathione repletion.

N-acetylcysteine is a cysteine donor your cells use to make glutathione, the main intracellular antioxidant that neutralizes reactive oxygen species (chemical byproducts that damage cells). More cysteine means faster glutathione rebuilding, which is why NAC shows up in liver and detox protocols. In the airways, NAC breaks disulfide bonds (the cross-links) in mucus, making it less sticky and easier to clear. There’s also brain research around glutamate signaling (a key neurotransmitter), but benefits for mood or compulsive behaviors are mixed and not guaranteed.

The suggested use is one capsule once or twice daily. Start with one dose for a week, then increase if you want a stronger effect. Take with food if you notice nausea; empty stomach can enhance absorption but bothers some people. For mucus, timing matters less than consistency, though many take it morning and mid-day. Expect mucus thinning within days, and glutathione-related changes—like improvements in ALT, AST, or hs-CRP (an inflammation marker)—within 4 to 12 weeks if you’re a responder.

Skip NAC if you use nitroglycerin or isosorbide; the combo can trigger severe headaches and low blood pressure. Use caution with active peptic ulcer disease or reflux, since NAC can irritate the stomach. Asthma that is easily triggered by odors warrants caution and clinician guidance. If you’re on chemotherapy, ask your oncologist before taking any antioxidant. Pregnancy and breastfeeding: safety data are limited, so avoid unless your clinician recommends it. NAC is not a home treatment for acetaminophen overdose—emergent care is required.