Weight loss/hair loss?

Hi Brooke,
I started losing weight in February. (5-10.5″ – I went from 207 to 152). Very happy about that. But I am noticing that I am losing more hair than usual each day. My hairdresser commented on it, too. In your experience, is hair loss ever related weight loss and does the hair come back again? In case it matters, I am about to turn 50.