NAC protocol for colds

The described NAC protocol is 1,200 mg daily for prevention or 900 mg three times daily during a cold, with treatment doses kept away from bedtime. 1

• Prevention: Divide 1,200 mg into two 600 mg doses. 2
• During a cold: Take 900 mg in the morning, late morning, and afternoon; avoid taking it close to sleep. 3 4
• Why it may help: NAC is a glutathione precursor and a mucolytic, loosening mucus; Huberman described relief of congestion and sinus pressure. 5 6
• Study result: One study reported clinically apparent influenza in 25% of NAC users versus 79% of the placebo group. 7 8