I get these in 200 mg effervescent tablets. I have used them a few times to ward off hangovers. The effect is not noticable enough from a single 200 mg dose to not be written off as placebo. I suffer from trich as well (hair pulling) and I had never heard about NAC as being used for this... I constantly scratch my beard and pull out a few hairs an hour. It feels so good when the hair finally leaves my skin, and when I look at it afterwards it feels so satisfying to know that the little black stringy thing is no longer stuck in me. I will try a large dose like 1 gram tomorrow morning to see if it reduces my compulsions to pull my beard hairs out with my nails throughout the day.
Edit: I forgot it this morning. Oh well. I'll try it now.
Edit2: Ew, five effervescent tablets in one glass of water tastes like eating out the asshole of an anthropomorphic lemon.