Wow! I love this product! I have PCOS, hypothyroidism, autoimmune and a multitude of other issues. NAC has so many uses and can help people with a diverse set of issues, including mood disorders, brain issues, lung problems, sleep disorders, infections and in states of oxidative stress. It can even help protect you from the flu.My hair is growing back, my skin is super clear, my moods are better! I am going to give my teenage daughter this supplement (less than my dose) and see how it works for See full review