Lemon juice helped me with my dark spots , didn't clear them completely but helped fading them till a large extend. Dilute it with water, but just a few drops . Take a q-tip , soak it in the juice and apply it on the marks of areas of hyperpigmention. I used to keep it for 15 minutes, some people keep it over night. It stinks, it is suppose to stink a little(or more),slight redness would occur but once you wash it of its back to normal. use it only at night. I used to use it when i was on no tropical, so see how it goes with other tropicals. Protect yourself from the sun.