Tyrosianse Inhibitors block tyrosinase enzymes from attaching to tyrosine, preventing its conversion into melanin. This unique blend is so effective that only 2% Hydroquinone is needed, minimizing irritation to sensitive skin. It’s ten times more effective than Kojic Acid, which only blocks melanin. Combining these ingredients provides the greatest protection against pigmentation, reducing it in two ways: decreasing the production of melanin and lightening any surface pigmentation including dark circles in the eye area.