Results of a 90-day rat study with eicosapentaenoic acid (EPA)-rich oil produced from GM Yarrowia lipolytica yeast produced no adverse effects at doses up to 976 mg EPA per kilogram of body weight per day, according to findings published in Regulatory Toxicology and Pharmacology.
“Exposure to EPA oil produced no test substance-related effects on body weight [...]

To determine GM foods, PCR (Polymerase Chain Reaction) based methods, commercial kits, bio-sensors, microchips and other methods are used.

PCR Based Methods: The most important steps in this method are; isolation of DNA, purification of DNA and preparing samples. The main methods of PCR are PCR-ELISA, Real-time PCR, Doubles, Multiplex PCR and quantitative PCR.
Commercial Kits: There [...]

Genetic science has been used to enhance foods nutritionally especially for poor people. Zeaxanthin riched potato, flavonoid enriched tomatoes, brassica and stearidonic acid (SDA) enriched canola ad omega-3 fatty acid and eicosapentaeoic acid (EPA) enriched soybeans are examples.
The new genetically modified crop is corn. It has been enhanced with vitamin A, C and folate. According [...]