On average, each BBL treatment will be associated with some permanent hair loss. So in most cases hair removal can only be achieved after several treatments. The number of treatments will depend on each patient’s individual response to BBL therapy, and the amount of hair to be removed. BBL can permanently reduce hair growth by 50 – 95% after 4 – 8 treatments. Also, know that the hair that remains is often lighter in colour and thinner than the original hair.