Okay, so I heard about L-glutathione on the radio one day. They were basically talking about how it helps your skin, so of course I decided to give it a try. As of today, I finally finished the whole bottle, so I'm ready to write my review. First off, you ladies are probably wondering what L-glutathione does/is. What L-glutathione is mostly known for is for whitening, but it also does other things. It helps protect you from free radicals to prevent cell damage, it helps remove toxins from your body, it helps your metabolism, & also you're immune system.