Ever wondered how Zac Efron achieved his chiselled physique ? Well, the Hollywood star has revealed all, including details of a lesser-known '12 hour rule' that helped him along the way. The performer, best known for his roles in The Iron Claw, High School Musical and The Greatest Showman, spoke on the Pardon My Take podcast where he divulged some of his health secrets. The first centred around the eating routine he follows to stay in shape, and it's not as simple as just cutting calories. In a