Can cocoa butter really lighten your skin?

I have heard it before, but was never actually sure. Does cocoa butter really lighten your skin tone?

Can cocoa butter really lighten your skin?
I think that you might be right. I have just recently started to tan in an indoor tanning bed, and after each session I apply cocoa butter to prevent dryness or any burns that might appear. I have noticed that I look very tan before I apply it and then the tan fades quite dramatically afterwards. So much for trying to get a tan:) The benefits I do get from using it are worth the possible lightening effects.