Importance of Niacin. Niacin is used by your body in a variety of ways. One main area is in the production of energy for your cells. Niacin helps your body convert the foods you eat into energy for your tissues and organs. Niacin is also used in digestion and nervous system function, and it keeps your skin healthy.
Cast. 1  Jeremy Sisto as Aaron Miller. 2  Kate Ashfield as Beth Miller. 3  Ryan Simpkins as Marley Miller. 4  Ty Simpkins as Max Miller. 5  Eric Michael Cole as Hangman. 6  Amy Smart as Melissa. 7  Ross Partridge.
The film features an ensemble cast, including Sylvester Stallone, Jason Statham, Antonio Banderas, Jet Li, Wesley Snipes, Dolph Lundgren, Kelsey Grammer, Randy Couture, Terry Crews, Mel Gibson, Harrison Ford, Arnold Schwarzenegger, Kellan Lutz, Ronda Rousey, Glen Powell and Victor Ortiz.