I Want To Take Glutathione Pills For Skin Whitening. For

I want to take glutathione pills for skin whitening. For how long should i keep on taking it and how many pills daily nd is vit C necessary with it? Will there be any side effects of this.What are the possible future side affects of this treatment? I hve severe pigmentation all over my body. I dont care much about being fair,but want to remove pigmentation. Will this solve my problems.

Thankx.