Cyspera is the brand name for Cysteamine, which is the main ingredient. Cysteamine is a chemical compound present in human tissue, and interestingly, it's highest concentration is within breast milk - tested and clinically proven as SAFE and well tolerated for long-term topical use.
Please check out the information on how to use Cyspera Intensive Pigmentation Corrector below. This product is used in a different way than most other skin care products, and can cause some mild irritation if used improperly.