 or you wake up during the night. That's why I want to tell you about Z-Factor. Z-Factor is a 100% drug-free way to help you fall asleep faster, sleep longer, and sleep better. Z-Factor is from the makers of Relief Factor, so you know they've done their homework. Z-Factor is more than just melatonin. Developed by doctors, Z-Factor uses a precise formula of four all-natural ingredients to calm your mind and relax your body so you ease into sleep faster.