However, here's why it might *seem* like dyed hair grows faster:
* Contrast: The difference between the dyed hair and the roots becoming visible makes the hair growth more noticeable. This is especially true if you're dyeing from a significantly different color (e.g., dark to blonde, or covering gray roots).
* Healthy Hair Practices: People who dye their hair regularly are often more conscious of hair care in general. They might use better quality shampoos, conditioners, and treatments to keep their hair healthy. Healthy hair is less prone to breakage, which can make it seem like it's growing faster.
* Damage Reduction: Hair dye can make hair slightly thicker due to the swelling of the hair shaft. Also, if people start getting their hair dyed less frequently they may be using less heat and harsh chemicals, which will result in less breakage and more apparent growth.
So, while hair dye doesn't actually accelerate growth, it can create the *illusion* of faster growth due to contrast and often associated with healthier hair habits.