What can brittle nails indicate about a person’s health?

Brittle nails can often serve as indicators of a person's overall health and nutritional status. When nails become brittle, they tend to break or split easily, which can suggest that the body may be lacking essential moisture and nutrients. Specifically, dehydration affects not only skin and hair but also nails, resulting in less flexibility and strength.

Brittle nails may also point to deficiencies in vitamins and minerals, such as biotin, protein, and certain essential fatty acids, which are vital for maintaining healthy nail structure. While there are other factors such as skin infections or allergies that can affect nail health, they are less directly linked to the condition of brittle nails compared to the signs of dehydration and nutritional issues.

Consequently, the most relevant connection in this context aligns with option A, as brittle nails often signal an underlying problem related to hydration and overall health, indicating the need for increased fluid intake and proper nutrition.