I have been using it for three weeks now. I am 21 and about a norwood two w/ temple recession, thinning in the crown. Immediately after i put that stuf in my hair, my hair fallout was zero hairs. I didnt shed a single hair for the first few days, maybe even a week. Now I shed just like normal, which is a lot. Zix seems to have a cosmetically beneficial effect though, my hair appears thcker for a while after putting it in. But after three weeks i havent noticed anything. Maybe ill try extra strenght? Also, ive been on propecia for almost a year now. Also been using xandrox 15 at night for a few months.