Utah Esthetics Written State Practice Exam

Which of the following functions does hydroquinone perform?

1. Stimulates collagen production

2. Inhibits the production of tyrosinase

3. Improves skin hydration

4. Acts as an anti-inflammatory

The correct answer is: Inhibits the production of tyrosinase

Hydroquinone is primarily known for its ability to inhibit the production of tyrosinase, an enzyme that plays a crucial role in the synthesis of melanin in the skin. By reducing the activity of tyrosinase, hydroquinone effectively decreases melanin production, making it a common treatment for hyperpigmentation disorders such as melasma and age spots. This mechanism allows hydroquinone to lighten dark skin patches while promoting a more even skin tone. The other functions listed do not accurately reflect hydroquinone's primary role. While stimulating collagen production is relevant in the context of other ingredients like retinoids, hydroquinone does not directly contribute to collagen synthesis. Improving skin hydration is associated with moisturizers and certain humectants, which hydroquinone is not. Additionally, while hydroquinone has some mild anti-inflammatory properties, this is not its main function and can be overshadowed by its primary effect of melanin reduction. Thus, the correct characterization of hydroquinone's function is its inhibitory effect on tyrosinase production.