Zac Efron, dramatically matured since his “High School Musical” days, reflects the results of his recent Z.E.N. diet in “New Year’s Eve,” which opened this weekend.

US magazine reported that Zac began his diet early this year, using Zero Effort Nutrition (Z.E.N.), a diet delivery service similar to Freshology, which helps celebrities lose weight by providing them with gourmet low-calorie meals at their doorstep. And it’s not just diet that helped Zac shape up for the role.

People magazine this year noted that Zac turned to a trainer, Logan Hood, and nutritionist, David Allan, to get that sleek physique. Those professionals, combined with Z.E.N. foods, have him looking much sexier than in his Disney days. [Source]