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
Yes and no. The body requires some protein, but not an exceptionally large amount of protein from a standard diet. Most of the fitness blogs are wrong, in part as a way of promoting whey proteins to sell to fitness junkies. https://youtu.be/D0ETy2bQHA8
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