<P> Healthy people eating a balanced diet rarely need protein supplements . </P> <P> The table below presents the most important food groups as protein sources, from a worldwide perspective . It also lists their respective performance as source of the commonly limiting amino acids, in milligrams of limiting amino acid per gram of total protein in the food source . The table reiterates the need for a balanced mix of foods to ensure adequate amino acid source . </P> <Table> <Tr> <Th> Food source </Th> <Th> Lysine </Th> <Th> Threonine </Th> <Th> Tryptophan </Th> <Th> Sulfur - containing amino acids </Th> </Tr> <Tr> <Td> Legumes </Td> <Td> 64 </Td> <Td> 38 </Td> <Td> 12 </Td> <Td> 25 </Td> </Tr> <Tr> <Td> Cereals and whole grains </Td> <Td> 31 </Td> <Td> 32 </Td> <Td> 12 </Td> <Td> 37 </Td> </Tr> <Tr> <Td> Nuts and seeds </Td> <Td> 45 </Td> <Td> 36 </Td> <Td> 17 </Td> <Td> 46 </Td> </Tr> <Tr> <Td> Fruits </Td> <Td> 45 </Td> <Td> 29 </Td> <Td> 11 </Td> <Td> 27 </Td> </Tr> <Tr> <Td> Animal </Td> <Td> 85 </Td> <Td> 44 </Td> <Td> 12 </Td> <Td> 38 </Td> </Tr> <Tr> <Td> Protein source with highest density of respective amino acid . </Td> </Tr> <Tr> <Td> Protein source with lowest density of respective amino acid . </Td> </Tr> </Table> <Tr> <Th> Food source </Th> <Th> Lysine </Th> <Th> Threonine </Th> <Th> Tryptophan </Th> <Th> Sulfur - containing amino acids </Th> </Tr>

Where does the body store the excess products of carbohydrate digestion