Genetic engineering can be used to modify existing food to give them new characteristics. The enhancement of the lysine content in maize and enhanced vitamin A content in canola and rice and the present example of the nutritional. For example the use of gene that increases the amount of vitamin A in rice. Golden rice is the genetically modified rice species that provides higher levels of vitamin A and iron. The enzyme involved in the fructan synthesis, the sucrose fructosyltransferase (isolated from jerusalem artichoke) was introduced into sugarbeet. The transgenic sugar beet shoewd a dramatic change in the nature of accumulated sugar, 90% of the sucrosr is being converted into fructan. Introduction of a highly expressed chalcone isomease led to a 70- fold increase of the amount of quercetin glucoside, which is a strong antioxidant in tomato.