According to this report I just read on their website:
The skin bleaching trend is getting out of control – especially in Africa. According to a new WHO report, Nigeria has the highest number of women bleaching their skin in Africa. Nigeria polled a whopping 77 percent compared to Togo’s 59 percent.
In our part of the world, one in every 10 dark skinned persons is now a patron of bleaching products, whether consciously or not. Most of us have come across at least one lady who attempts to whiten her skin. They are easily identifiable by the uneven patches of darker skin fading away and the dark color still retained by the joints, the elbows and knuckles.
Those who who successfully bleach look almost ghostly, because even with the new skin tone on top, there is an underlying layer of dark skin that makes them look slightly off-color.
Usually the preferred method is to use lightening lotions and soaps. Some may use stringent facial cleansers, body scrubs, and even anti-fungal creams in order to bring out their inner beauty. There are even rumors of a particular drug designed to help flush out impurities and lighten the skin.
In the united States, women prefer to surgically lighten their skin with high doses of medical grade Vitamin B-12.