Diet plays an important role in the management of diseases. A striking example is phenylketonuria (PKU), an inherited metabolic disease that leads to severe mental retardation if left untreated.1 However, a life-long low-phenylalanine diet started shortly after birth enables patients to develop normally and lead productive lives.2 A key factor in successful diet management is having readily accessible nutrition information. In that spirit, electronic versions of nutrient databases, such as the US Department of Agriculture’s National Nutrient Database for Standard Reference,3 have been made available.
