#37446
it varies. Some took years while others took months only. Some never changed. Verified it with my frequent users in my shops and friends too. I am sure it depends on how much pollution in surroundings that go thorough body cycle. And how much dirt and filth left in body. I still use it frequent specially weekend and it helps me soo much. It does change color if I fest and eat veggie only though. I know it cause the patch changed to light yellow (instead of light browned) when I fest during chinese new year. Don't think it will ever change to all white. Choose a very good footpad like mine and try it :) some times wish people stop driving smoky cars and go by bicycle. Jimmy