Which of the following is a sign of healthy hair?

A shiny appearance is a significant indicator of healthy hair. When hair is well-moisturized and has an intact cuticle layer, it reflects light, leading to a shiny look. This shine indicates that the hair is smooth and well cared for, which often correlates with good overall hair health. Healthy hair tends to be resilient, easy to manage, and vibrant, making shine an important characteristic to observe.

In contrast, frizzy texture, split ends, and dull color typically indicate damage or poor hair health. Frizz often results from hair that has been stripped of moisture or affected by humidity and environmental conditions. Split ends occur when the hair is brittle or over-processed, leading to strands breaking or splitting. Lastly, dull color may suggest a lack of moisture and nourishment or damage from chemical processes, indicating that the hair is not in its best condition. Therefore, a shiny appearance is the best marker of healthy hair among the given choices.