If it's becoming a fad, that's a great thing. NAC is a powerful immune system supporter as an antioxidant because it's the building blocks for the body to make Glutathione, the real powerhouse. It's been commonly used as such in the natural medicine circles for decades. It's wonderful seeing so many people waking up to how toxic and poisonous Big Pharma is and discovering natures remedies that really support vitality, cure and correct the problems, instead of just masking symptoms, while the body further breaks down and create new ones with side effects. A side effect is additional damage being done to the body from the drugs poisons. Big Pharma's job is to make you sicker. They do not cure. There is no money in cures. Check out web-sires like Earth Clinic and Cure Zone, Check out the Medical Medium Anthony Williams!!!