DNA extraction methods for detecting genetically modified foods: A comparative study

► Different methods for extracting DNA from raw maize products were evaluated. ► DNA extract obtained from Roche kit was the best method for extracting DNA. ► Yield of DNA extracted from maize products was lower in the processed products. ► Seventeen samples were positive for the presence of 35S promoter. ► Thirty four percentage from the samples were positive for the genetically modified maize line Bt-176.