i've been seeing some results with Glutathione Soap.
i apply this at night, wait for it to dry and then apply it with vaseline.
you can use any choice of your soap.
hope this helps.
heres my lil "guide" to lightening the lips
http://www.askmehelpdesk.com/skin-li...ml#post1922859
leave any questions you may have and i'll answer them with care!