When used in medical treatment, the typical recommendation for NAC is between 600 and 1,800 milligrams. In some studies, researchers have people take up to 3,000 milligrams a day, divided into two ...

NAC may be less toxic and more soluble than l-cysteine itself, which is why NAC is often used in supplements instead of l-cysteine by itself. Dosage A common dose of NAC is 600–1,200 mg per day.

This study provides evidence that a daily dose of NAC 1200mg, twice the currently recommended dosage, improves outcomes in patients with exacerbations of COPD.

N-acetylcysteine (NAC) is a supplement form of cysteine - a non essential amino acid that is present in high-protein foods, such as chicken, turkey, yogurt, cheese, eggs, sunflower seeds and legume.