Which of the following is NOT a healthy hair practice?

Over-washing hair with sulfate shampoos is indeed not a healthy hair practice. Sulfates are harsh detergents commonly found in many shampoos that can strip the hair of its natural oils, leading to dryness and potential damage. Healthy hair care practices emphasize maintaining moisture and protecting the natural integrity of the hair, so using gentle, sulfate-free products is often recommended.

Conversely, using moisturizing products regularly helps maintain the hair's hydration, while protecting hair from environmental damage—such as UV rays and pollution—is essential for keeping hair healthy and vibrant. Similarly, limiting tight hairstyles is important because excessive tension can lead to traction alopecia and hair breakage. Therefore, these practices contribute positively to overall hair health, while over-washing with sulfate shampoos does the opposite.