N-acetyl cysteine (NAC) is a supplement form of the amino acid cysteine, and was recently banned for public sale by the FDA, now requiring a prescription.
NAC helps replenish glutathione, arguably your body’s most powerful antioxidant. NAC’s antioxidant and expectorant capacity can improve lung function by decreasing inflammation as well as breaking up mucus.
I'm a huge proponent of getting nutrients from food, so here's a list of foods containing high levels of cysteine.
Eat on, friends ✌🏻