Can NAC prevent colds and flus?

N-Acetylcysteine (NAC) has shown some potential in preventing colds and flus. In a specific study, only 25% of participants who took NAC contracted the influenza virus compared to 79% in the placebo group. This indicates that NAC might help in reducing the incidence of flu, especially when used as a preventative measure. NAC works primarily by increasing levels of glutathione, a crucial antioxidant for general health. Despite these promising results, the evidence is still limited, and further research, especially randomized controlled trials, would be beneficial to confirm these effects. Andrew Huberman suggests a preventative dosage of about 1200 milligrams per day, split into two doses of 600 milligrams each. However, he advises caution in terms of potential sleep disruption when taken close to bedtime. It's important to consult healthcare providers before starting any new supplement regimen 1.