Proteins are primarily used for tissue repairs and synthesis. They are polymers of amino acids used to make hormones, enzymes and other chemicals of the body. Therefore proteins are only reserved for synthesis and repairs of tissues.
During extreme starvation periods when then is no source of carbohydrates and adipose tissues has been depleted/used up, proteins are alternatively used as source of energy in form of amino acids that enters the liver. Tissues such as muscles are protein degraded to provide the brain with energy in form of ketone bodies and glucose, thus the weight loss in people suffering from malnutrition.
not really a pro at health but I can try! I would say have a different diet while healing and stay home from soccer and let it heal. he should go to therapy daily for updates to see if his arm is healing or not. he should not take to much pressure onto his arm.
