How does hydroquinone work?
Hydroquinone works by slowing down the production of melanosomes. It also increases the breakdown speed of the melanosomes. These melanosomes are responsible for creating melanin, the dark pigment in the skin's pigmented cells (melanocytes). On a biochemical level, hydroquinone inhibits the activity of an enzyme called tyrosinase. Tyrosinase is necessary in the production of melanin.
Hydroquinone should not be used while pregnant or breastfeeding.