Euoko is a company that is coming out with skin lightening pills - in late fall.
www.euoko.com
You can check out the site. It's got probably the best skin lightening product I've seen so far. It is quite expensive. 200$ for a one ounce skin whitening serum, but, I think it works - I've just started using it.
You could probably wait for euoko's skin lightening pill.
I had mailed them, asking them whether glutathione pills or accutane(which I take for my pimples) will interact with the skin whitening serum. This was their reply:
The Carrara collection will not interact adversely with either Accutane or L-Glutathione. Please note, however, that: (a) Accutane, while is a very effective product, does have many potential side effects; these side effects are not as a result of any interaction with the Carrara collection; (b) L-Glutathione can have a mild lightening effect only if taken in very high doses, only in stable, reduced form, and only in the presence of very high quantities of Vitamin C. Our lab has been studying internal skin lightening compounds and we are in the process of filing a patent for an internal supplement to be used for skin whitening. This product is undergoing testing at this time and is expected to be launched in late fall of 2006.