Vermont Barbers and Cosmetologists Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the main function of keratin in hair?

To provide color

To provide structure and strength

Keratin plays a crucial role in the composition and functionality of hair. Its primary function is to provide structure and strength, which is essential for the overall resilience and durability of hair strands. Keratin is a fibrous protein that forms the basic building block of hair, ensuring that it maintains its shape, elasticity, and tensile strength. This structural integrity is vital for protecting hair from damage caused by environmental factors, styling practices, and chemical treatments.

While other factors like pigmentation contribute to color, and additional agents or treatments can influence shine and moisture retention, the fundamental role of keratin is fundamentally about fortifying the hair's structure. Therefore, understanding the importance of keratin assists in recognizing how it contributes to the health and appearance of hair overall.

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To promote shine

To retain moisture

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