A recently published review by researchers at two universities has suggested that there is not enough evidence that GM crops are safe to eat.
Researchers looked at published studies on rats fed GM crops containing one or more of three commonly used GM genes. Researchers examined studies that investigated the health of these rats by looking at tissues from their digestive tracts under a microscope. The digestive tract is a likely place for damage to occur from eating these crops. Researchers considered evidence obtained by looking through a microscope because it is sometimes very difficult to see if there is damage to tissues without using a microscope. These are called histopathology studies.
The researchers found 47 crop varieties with one or more of these genes that government regulators had said were safe to eat. However, no published studies could be found for 81% of those crop varieties.