Which of the following is a characteristic of enzymes in exfoliation products?

Enzymes used in exfoliation products are often derived from natural sources, particularly fruits. This characteristic highlights their efficacy and gentleness in promoting skin renewal by breaking down the bonds that hold dead skin cells together, allowing for a smoother and more radiant complexion without the potential harshness associated with some physical exfoliants. Common examples include papain from papaya and bromelain from pineapple, which are celebrated not only for their exfoliating properties but also for their additional skin benefits as they contribute to improved texture and tone.

In contrast, the other characteristics mentioned do not accurately represent the primary nature of enzymes in these products. While it's true that over-exfoliation can occur with any exfoliation method, it is not a defined characteristic of enzymes themselves. Additionally, many enzymes are naturally derived rather than synthetic, and while any ingredient can potentially cause irritation, enzymes are generally formulated to be non-irritating when used correctly.