A healthy scalp is a vital part of having healthy hair. A portion of hair inside the scalp is the only living part of the hair. So, for hair health, one must also have a healthy scalp.
Dandruff is a condition that impacts the scalp, and dandruff affected scalp cause damage to hair growing in it. It is not compulsory that dandruff will slow down the growth of hair. But, surely, the hair that grows from dandruff impacted scalp will be less healthy and more prone to breakage and damage.