She does mention NAC in the book as well. This is from the book (I live being able to copy from the kindle edition):
If you have a moderate to severe case of copper overload and suspect sluggish liver function, try boosting your sulfur reserves with a daily dose of 50 to 150 milligrams of alpha lipoic acid, or 100 to 300 milligrams of black radish root, or 200 to 500 milligrams of N-acetyl-cysteine twice a day, and 50 to 150 milligrams of reduced glutathione.