How do Quats help in maintaining hair moisture?

Quats, or quaternary ammonium compounds, are effectively used in hair care products primarily because of their ability to form a barrier that helps retain moisture in the hair. When applied, Quats adhere to the hair fibers, creating a protective layer. This layer serves to minimize water loss from the hair, which is critical for maintaining hydration levels. Adequate moisture in the hair is essential to prevent dryness, brittleness, and breakage, ensuring that the hair remains manageable and healthy.

The other choices do not contribute to moisture retention in the same way. While thickening agents may enhance the texture of products, they do not specifically address moisture retention. Fragrance contributes to the sensory experience of a product but does not affect moisture levels. Lastly, color pigments are used for cosmetic purposes to enhance hair appearance rather than to support moisture retention. Thus, the primary role of Quats in preventing moisture loss clearly supports the correct response regarding their function in hair care.