We gain and loose many things every single day , we loose 2 kg of our skin every year, did you notice that ? - Similarly we learn many many things by being in new places, we can not notice it, but we are still learning Though you can't see it happening, every minute of the day we lose about 30,000 to 40,000 dead skin cells off the surface of our skin. So just in the time it took you to read this far, you've probably lost about 40,000 cells. That's almost 9 pounds (4 kilograms) of cells every year!