I started taking NAC first thing in the morning if I felt a little off or had a little congestion. I made the mistake of taking it with breakfast and it upset my stomach a bit. Now I take on an empty stomach. Any ill health symptoms just go away within a day. A also gave a weeks' supply to my adult niece who had been fighting a nasty cough for three weeks. After just a couple of days, her cough was gone. I do take other supplements too like Quercetin, Vitamin D3, Zinc, Elderberry, Vitamin C, and Magnesium. Plus,
Good nutritious food=Good Medicine. The key is to support your own immune system as much as you can and stay away from all of these pharmaceuticals doctors try to push on you that harm your organs and immune system.
Double Wood - Solid company
NAC (and Quercetin) - Solid products