Some of the past year's greatest transformations in film have been "underdogs" packing on the pounds to create some of the greatest legends of all time. One of the best examples? Michael B. Jordan.
Our December 2015 cover guy adopted a seriously regimented training and diet program to jack up his physique to helm the boxing epic, Creed.

If you're doing the same—you’re working out, paying close attention to your nutrition, and staying on track to reach and maintain your health and fitness goals—but want to maximise your efforts, there's one thing you shouldn’t overlook. That's quality protein. If you’re a long-time Men’s Fitness reader, you probably already know that whey protein is your ideal pre and post-workout protein choice. However, what you may not know a great deal about are the numerous benefits of another protein: casein