I don't think that any study on the benefits of protein intake is meaingful if it does not also take into account exercise. The effect of a protein-only diet on

I don't think that any study on the benefits of protein intake is meaingful if it does not also take into account exercise. The effect of a protein-only diet on a largely sedentary animal that lives in a small cage is likely to be very different than the effect on a human who exercises regularly.