Come to think of it, NAC is often used to post glutathione in the body, being the most important component, so I'm wondering if that's what I've been doing all along for the last several months and that's why I've been improving (at least as a partial reason) by taking NAC. Interesting. I'm still going to try the glutathione, but now I'm curious what will happen as I take both, since I won's top taking the NAC.