Prolab's Training Paks feature a comprehensive formula providing an excellent and complete way to support your intense training program with essential nutrients. Prolab isolated these nutrients in six easy- to-take nutrient-rich supplements. Each packet provides B vitamins, which play a crucial role in breaking down carbohydrates and fat for energy; and minerals such as calcium and magnesium to help maintain strong bones. The Training Pak formula also contains important antioxidants such as vitamins E and C, which help neutralize oxidative free radicals caused by intense training.*