
Insulin Sensitivity, Protein Uptake, and Muscle Preservation During Fasting
Maintaining muscle mass during fasting relies on cellular insulin sensitivity, bioavailable dietary protein, and mechanical tension rather than constant eating.
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Maintaining muscle mass during fasting relies on cellular insulin sensitivity, bioavailable dietary protein, and mechanical tension rather than constant eating.

The digestion argument against it turns out to be partly wrong — but the reason it works is not the reason it is sold.