What type of hair is most oil-prone and may require frequent washing?

Curly hair is most oil-prone and may require more frequent washing due to its structure and the way that natural oils distribute across the hair. Curly hair has bends and twists that can prevent the natural oils produced by the scalp from traveling down the hair shaft as efficiently as it does in straighter hair types. Consequently, oils can accumulate at the scalp, making the hair appear greasy more quickly.

Frequent washing is often necessary to remove that excess oil buildup and keep the scalp and hair feeling clean and fresh. Additionally, curly hair might also be more prone to dryness, which can lead individuals to adjust their washing frequency to balance oiliness and hydration needs. This combination of factors makes curly hair the most oil-prone option among the choices provided.