What term refers to ingredients designed to dissolve keratin proteins on the surface of the skin to make it softer and smoother?

• A. Exfoliants
• B. Surfactants
• C. Enzymes
• D. Humectants

Answer: (C)

The term that refers to ingredients designed to dissolve keratin proteins on the surface of the skin, resulting in a softer and smoother texture, is enzymes. Enzymes work by breaking down the keratin proteins, which is particularly effective in exfoliating the skin without causing irritation that can occur with physical exfoliants. This enzymatic action promotes cellular turnover and can enhance the overall appearance and feel of the skin, making it a popular choice in various skincare treatments.

Exfoliants, while related, generally encompass a broader category that includes both physical and chemical methods of removing dead skin cells. Surfactants are primarily used to lower the surface tension of liquids, aiding in cleansing and creating foams rather than directly dissolving keratin. Humectants, on the other hand, are designed to attract and retain moisture in the skin, not to dissolve protein structures. Thus, enzymes stand out as the specific agents that target keratin for a smoothing effect on the skin's surface.