Abstract: A method for improving the absorption of amino acids from protein sources include adding one or more carbohydrases to a protein source. Plant protein such as that found in rice may be extracted to provide a rice concentrate useful in regimens requiring elevated amounts of protein consumption. To improve the absorption of the amino acids found in rice inside the human gastrointestinal tract, a carbohydrases such as Alpha-galactidase is added to the protein source prior to ingestion. The composition may also include proteases.