What is the function of keratolytic enzymes?

Keratolytic enzymes play a crucial role in skin care by speeding up the breakdown of keratin, a fibrous protein that is a key structural component of the skin, hair, and nails. This action helps to promote the shedding of dead skin cells and can assist in exfoliation, making the skin appear smoother and healthier. By breaking down keratin, these enzymes can also help in treating various skin conditions such as acne, psoriasis, and hyperkeratosis, where there is an excess buildup of keratin on the skin's surface.

The other functions do not align with the primary role of keratolytic enzymes. For example, moisturizing the skin involves hydrating agents rather than enzymatic action. Enhancing blood circulation typically involves physical stimulation or other ingredients that promote blood flow, rather than enzyme activity. Tightening skin is usually related to products that contain certain astringents or peptides, which help firm the skin's appearance rather than break down keratin. Therefore, the main and most accurate function attributed to keratolytic enzymes is their ability to speed up the breakdown of keratin.