If you use the Search icon above, and put quotation marks around "hair loss" you will be taken to lots of threads that discuss this. For instance:
http://forum.lowcarber.org/showthre...oss#post1319757

http://forum.lowcarber.org/showthre...light=hair+loss

http://forum.lowcarber.org/showthre...light=hair+loss

It seems that losing weight causes some hair loss for the first months as the follicles shut down. But they do come back. at least you'll see that you're not alone in this.

hair loss also comes a few months after a time when you were not well nourished. So you could be losing hair from a low fat/low cal diet you tried back in March or April.