Countless UFC fighters have faced adversity and have eventually pulled through. From growing up in an impoverished environment to battling mental health issues, many of the fighters known today have sought mixed martial arts as a source to overcome their struggles.Within the UFC, a small percentage of fighters were controlled by addiction. Addiction is a disease that affects many people and is more common than many may believe. Although MMA fighters are viewed as tough warriors, they are just as susceptible to falling prey to this disease.Some of the toughest names on the promotion's roster have made this list. They are living proof that addiction is not the end and it is possible to become a better person after it. Here a list of five UFC fighter who have overcome addiction.