Laser hair removal is more suitable for people who have a darker pigment in their hair, as the laser targets the melanin – the type of pigment that provides the hair with colour. So the darker the hair, the more effective laser hair treatment will be.
Therefore, if you have very blond or grey hair, then laser hair removal will not be as effective than if you had darker pigment. Also, if you are undergoing any kind of hormone treatment, this can affect the efficacy of the hair removal.