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
Your body can create fat molecules to store energy in. It can do that with the energy extracted from breaking down proteins. That doesn’t mean your body can go in the other direction and turn fat energy into whatever.
You might have heard the term “essential amino acids”. Those are the amino acids that are essential to have in your diet, because your body can’t make them. Protein structures tend to need all the amino acids in varying quantities, so you need to consume enough decent quality protein that contains those specific amino acids.
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