What is the term for hair that is overly porous and becomes damaged easily?

The term for hair that is overly porous and becomes damaged easily is compromised hair. When hair is classified as compromised, it indicates that the cuticle layer is damaged or has been stripped away, leading to an inability to retain moisture and oils. This condition makes the hair more susceptible to breakage, frizz, and other forms of damage.

The other options do not pertain to the condition of hair with high porosity. Healthy hair, for example, typically has a strong cuticle layer and retains moisture well, while normal hair reflects a balanced structure and porosity, meaning it is neither overly porous nor overly dry. Vibrant hair generally refers to hair that exhibits a lively appearance, which may not specifically address its structural integrity or porosity issues. Thus, compromised hair accurately describes hair that has become weak and damaged due to excessive porosity.