What is hydroquinone?

Hydroquinone is recognized primarily for its strong skin-lightening properties. It is a phenolic compound that inhibits melanin production, thereby reducing pigmentation and the appearance of dark spots on the skin. This makes it an effective treatment for conditions such as melasma, age spots, and other forms of hyperpigmentation. Its role as a skin-lightening agent has led to its use in various cosmetic and dermatological products.

The other choices refer to different types of skincare ingredients but do not accurately describe hydroquinone's primary function. For instance, moisturizers focus on hydrating the skin, sunscreens are designed to protect against UV radiation, and antihistamines are utilized for allergy relief. Each of these serves a distinct purpose that is unrelated to the use of hydroquinone in skin care.