Hyperpigmentation

Melanin science has always fascinated me. The very protective molecule can also cause undesirable pigmentation on skin. The market is flooded with skin lightening, spot reduction, brightening serum. The skin of color faces more challenges with stubborn pigmentation. I am curious to know what are the issues faced by melanin rich skin and also the best way to prevent, treat or cure hyperpigmentation of skin. Looking forward to the thoughts