What term describes the tendency of a topical substance to cause or worsen a buildup of dead skin cells?

The term that describes the tendency of a topical substance to cause or worsen a buildup of dead skin cells is comedogenicity. Comedogenic ingredients can clog pores, leading to the formation of comedones, which are essentially clogged hair follicles that can result in acne. Understanding comedogenicity is crucial for estheticians and clients alike, especially when selecting skincare products, as those with acne-prone or oily skin need to avoid formulations that exacerbate their condition.

In contrast, hypoallergenic refers to products that are less likely to cause allergic reactions. Emolliency relates to the ability of a substance to soften and moisturize the skin, while dermatological efficacy describes how effective a product is for dermatological conditions in general. These terms are different from comedogenicity and focus on other aspects of product formulations rather than their potential to contribute to a buildup of dead skin.