What is the main purpose of nail oil?

The primary role of nail oil is to promote nail growth and moisturize the cuticles, making this answer the most accurate. Nail oils typically contain a blend of nourishing ingredients that deeply penetrate and hydrate both the nails and the surrounding skin. This hydration is crucial, as dry cuticles can lead to hangnails and damaged nails, which might hinder growth. By keeping the cuticles healthy and well-moisturized, nail oils support an optimal environment for nails to grow strong and healthy.

In contrast, other options address different aspects of nail care. For instance, the removal of nail polish involves solvents that break down the polish, which is not the function of nail oil. Similarly, while some products may claim to harden nails, nail oils are not designed for this purpose and do not contain the necessary hardening agents. Lastly, improving nail color typically involves the application of nail polish or colorants, not oil, which is meant to nourish rather than color the nails. Therefore, the use of nail oil is essential for maintaining nail health and supporting their growth through hydration and nourishment.