In Eastern Europe, male life expectancy at birth averages 63.7 years compared to 74.9 for females, a difference of over 11 years. There are some companies that offer testosterone boosters in the form of illegal steroids, but these are unsafe and unhealthy. There are natural testosterone boosters that do not contain steroids, but can still help you build muscles fast and give increased endurance during sports or workouts. It's also a good idea to be monitored by a doctor while taking a testosterone booster to be sure the supplement doesn't affect your body in a negative way. Testosterone boosters are not meant to substitute for real workouts and proper weight training.>> http://www.revommerce.com/c4-cellucor-pre-workout/