Thoughts on gluthatione soap

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There are many soap varieties today and one of these is the Gluthatione soap. There are many of them in herbal shops and the like. Gluthatione is one of the components that our livers (if my readings are correct) release for our body to cleans the organs. The component's other effect include skin whitening. However, sometimes, our body doesnt release enough glutathione, thus, there are companies who manufacturer gluthatione pills to cleanse the liver (and to whiten the skin). Now here comes gluthatione soap, which is obviously not taken into the body unlike the pills. I guess the glutha's main purpose in the soap is for whitening. But does it really work, considering that glutha works from inside the body outwards? Do you use a glutha soap? Why so? and for how long?