shedding: how much is too much?

Question for J from Jae:Hi J,I've noticed that a lot of hair has been coming out when I detangle my hair. I'm just not sure if I should be losing that much, maybe I'm a little paranoid. But if it is breaking, I really want to handle it before it goes haywire. Sometimes even when I slightly manipulate it, I'll see some falling out.Some hair background: I wash my hair twice a week, deep