As far as I can tell all fitness blogs say you have to eat lots of protein to build muscle (with exercise). But why protein specifically? If excess calories from any macro can be converted to fat by the body, why do we need protein to build muscle? Couldn’t the body just use excess from any macro combined with weight lifting exercises to build muscle ?
In: Biology
You could think of it as building a house. Protein would be long boards that can be cut up to build what you need. Sugars and fats are more like small blocks or firewood. You can burn all of them as calories but it’s a lot easier to build with the long stuff that can be cut to fit.
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