I started NAC a month ago for bipolar II and so far no huge impact. My pdoc seems to think there are some recent animal studies that point to potential negative effects from NAC but she didn't have time to elaborate (appointments are very short and she knows I do my own research), but I can't find any. Anybody know what's up?

NAC has very promising early study results for OCD, hair pulling and skin picking, bipolar, and irritability in autism. But it is a precursor to the body's most significant antioxidant and thus has a broad array of effects in the body so it could of course have side effects.