Questions on Genetically Modified Foods - GMAC

There are some questions on genetically modified food asked and answered at this website:

http://www.gmac.gov.sg/Index_FAQs_Genetically_Modified_Foods.html#seven

1. What foods are produced from GMOs? What is the approximate no. of such products in the market?
2. How long have GM foods been in the market?
3. Are the foods produced from GMOs safe for consumption?
4. Are foods derived from GMOs more nutritious?
5. Are we already consuming foods derived from GMOs?
6. Will foods produced from GMOs carry special labels in Singapore?