material, products of that material, new proteins for example, toxicity, potential toxicity, halogen this city, chemical composition to see if it is different from the conventional counterparts, we look at the safety of the old food if you will, we look to see if there are any differences in nutrients that might require disclosure for example. >> how long typically does your evaluation take? >> i will have to get back to you with detailed information if i may. >> any material differences between genetically engineered ingredients and those derived from traditional the red cross? >> in general no. there have not been such differences. >> does the fda support various state, legislative and ballot measures that would require the labeling of genetically engineered foods or would these initiatives interfere with fda's authority over food production or labeling? >> we have not reviewed the initiatives, don't have any view about them. we don't know if they would interfere or not. >> would state specific labeling requirements change anything as far as your evaluation is concerned? >> i do not believe