I remember hearing somewhere that the body undergoes a series of detoxification phases as you sleep. The body can only perform this process when you are asleep so getting 7-9 hours of sleep is not enough; it's when you get the sleep that's also important. However, I tried using Google to find this information but all I get are advertisements about detox pads and medicines. Is what I claim above true and if so, can you provide me with some sources? Preferably one that contains the hours that each organ detoxifies? Thanks.