First and foremost that Hydroquinone should be used cyclically – not more than 4 months in one cycle. Your skin should rest of hydroquinone with such great ingredients like kojic acid, azelaic acid, arbutin, and other natural & healing lightening agents (especially if you have darker skin).
Hydroquinone works by blocking the tyrosinase enzyme, which is responsible for the melanin production – skin pigment. As long as you continue using hydroquinone, your tyrosinase enzyme blocked, and hence skin dark pigment production.
Never use simultaneously any other products containing benzoyl peroxide & resorcinol while you are using products containing hydroquinone.
Not allow hydroquinone to get anywhere near your eyes.
Hydroquinone has NOT been directly linked to cancer in humans — only mice, Hydroquinone is likely not a cancer-causing agent. Dr. David J. Goldberg, a clinical professor of dermatology at the Mount Sinai School of Medicine states, “Over 100 scientific articles confirm hydroquinone is a safe topical for humans; no independent studies prove the opposite.”
Skin Care Professional
“Marcella Jiovanni actively promotes the importance of maintaining healthy skin, she envisions the future of dermatology as moving away from pure medical, pharmacological dermatology and flowing more toward a holistic approach to wellness and skincare.”