You probably know that protein is a really important macronutrient for building muscle. In fact, my little sister probably knows that protein is important for building muscle. There is some truth to this—if you don’t eat enough protein your body won’t build muscle. This is a common problem for some absolute beginners, vegetarians and vegans—they eat too little protein and thus struggle to put on muscle.
But what about your regular gym dude? What about the guy that trains 6 times a week? What about a skinny ectomorph trying to pack on muscle? They all probably think they need a hell of a lot of protein.
…and eating a diet overly high in protein is a great way to limit the amount of muscle you build—especially as an ectomorph.