How long does it usually take for shed hairs to regrow and become visible again? And also, if you've lost 50% of your hair, would you still shed hair at the same rate of 50-100 per day?
Normally no. But If you have lost 50% of density then you are balding and if you are balding you shed more hairs than normal due to shortcycling. So I can't give you a definite answer on that.