Is laser hair removal really permanent or 100% permanent?

Strictly speaking the permanent of laser hair removal it is not really hair removal forever. As to date, there is no laser equipment that has been approved for permanent hair removal but has been approved for permanent hair reduction by the FDA.
Hairs has three distinct growth phase that is Active growth phase, Regressive phase and Resting phase. The laser most effectively disables hair that is in the active growth. Our hairs are always in a different hair growth cycle, even after several times of laser hair removal treatment, laser only can disables hair that is in the active growth not disables hairs that is in other growth phase. That is the reason of laser hair removal can not really removal hairs forever.
Most people regardless of the kind of skin, male and female will see that the 80% to 90% of hairs is greatly reduced and hair which does grow is often much finer and lighter in color after 4 to 6 laser hair removal treatments.
It should be noted that, the number of laser hair removal sessions needed to achieve these results can vary from person to person depending on many factors such as age, skin type, amount of hair, hair color, hair texture, etc.
Overall, laser hair removal is still the best option. Although electrolysis is considered a permanent hair removal method that has been used for the past 125 years, but electrolysis is more injury, risk and expensive than laser hair removal.