To distinguish whether edible oil is genetically modified or non-genetically modified, you can use the following methods:

1. Check the product label: Some edible oil products will indicate whether they are genetically modified products. You can Look for relevant markings or instructions on the packaging. For example, the U.S. Food and Drug Administration (FDA) requires genetically modified foods to label information such as "Genetically Modified" or "Contains Genetically Modified."

2. Understand the source of raw materials: Genetically modified crops are mainly derived from soybeans, corn, cotton, etc., while non-GM crops are derived from traditional natural planting methods. Therefore, if the raw material of the edible oil is a genetically modified crop such as soybeans or corn, then it is likely to be a genetically modified edible oil.

3. Observe the color and transparency of the oil: GMO cooking oil is usually clearer, more transparent, and lighter in color than non-GMO cooking oil. This is because the content of protein and other ingredients in genetically modified crops is lower, which makes the color and transparency of the oil better.

4. Query relevant information: You can check relevant literature, research reports or information released by official agencies to find out whether a certain edible oil is a genetically modified product. In addition, several NGOs and websites provide information about genetically modified foods.

It should be noted that the safety of genetically modified foods is controversial in the scientific community and the public. Although many studies have shown that genetically modified foods are safe after undergoing a rigorous approval process, there are still concerns about the long-term effects that are not yet clear. When choosing cooking oils, you can decide to use GMO or non-GMO products based on personal preference and food safety awareness.