Molecular biology is revolutionizing biology. agriculture and medicine. It is now possible to isolate and sequence the basic genetic material (DNA) from any organism and techniques have been developed to copy and 'cut and paste' DNA molecules to produce new combinations. This has led to the development of genetically modified (GM) plants by the targeted introduction of a small number of well-defined genes directly into the cells of an existing plant variety to improve its quality or performance. Early efforts concentrated on major field crops. such as corn, soybeans and canola. Products from these plants, such as oil and flour, are components of many processed foods, so the rapid adoption of GM commodity crops in the United States has led to widespread appearance of GM plant material in foods. The initial traits targeted, such as herbicide tolerance and pest resistance. provide improved production efficiency with benefits for agrochemical and seed producers, farmers and the environment. but little obvious benefit to consumers. The second generation of GM plants will provide consumer benefits and will extend beyond bulk commodity crops. Genetically modified plants with improved flavour, nutritional composition and shelf life are currently being developed in a range of grains, fruits and vegetables. Genetically modified plants pose no risks for human health beyond those that we readily accept in other foods. In most developed countries. GM plants undergo thorough testing and evaluation, well beyond that required for a conventionally bred new variety, and this should ensure that the current high safety and quality of foods is maintained.