Before buying any of these kinds of products, I read several reviews online about how and if these products really work. Everything I found indicated that this was a legitimate idea and that it really does remove toxins from your system. What convinced me most, was that after a period of time the the pads react differently, and do not turn as dark, indicating that there are not as many toxins as there were when the process started. (and that they don't simply turn dark when your feet sweat)
I have had discoloring in my feet for several years, which doctors have said was just that I am getting older... In the month since I started using this product, the discoloring of the skin in my feet has been reduced. I've applied the pads to the bottoms, tops and sides of my feet, and have absorbed toxins from all locations. I have noticed that there are fewer toxins now in the bottoms of my feet, which seems to support the claims written in the online reviews.
Lastly, this product is packaged in several zip lock storage bags, keeping everything fresh. A very good value, for an excellent product!