Protein
Any food you eat requires energy to digest. Protein requires more energy than fat or carbohydrates to digest. Therefore, eating a diet high in protein not only helps retain muscle tissue it can also help burn more calories because it takes 20-30% of the energy to digests it. An added bonus to eating more protein.

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Disclaimer: Hypermuscles.com does not promote the use of anabolic steroids without a doctor's prescription. The information we share is for entertainment and research purposes only.

As stated elsewhere and I've suggested privately to some, a problem with eating too much whole food protein when trying to pack in the calories is that it can fill you up too much. Swapping some meals to easily digestible protein shakes can help you get through that satieting barrier.