Hi,I have question about glitathione,been using Luxxewhite glitathione whitening pill for almost 3 years,it has a very good result in my skin,I achieve the whitening result on my skin,but it starts my skin to be itchy and reddish on my face,I stop taking it then the itchyness and redness gone!!!then I continue to use again and my skin starts again to itch!!!thats why I try deferent brand but I don t know cause just started to use this new brand!!!what are the side effects of using glutatione whitening pill!!!