NAC could be a problem. Some suggest it should be taken together with high doses of vitamin C and there are some studies that it increases oxidative stress if you exercise much. I've also read that NAC doesn't really increase Glutathione levels, but concentrates it into the liver helping the detox, but reducing levels outside of the liver can't be a good thing. Just eat avocados, garlic, and take Milk Thistle and you won't need NAC.