Vegetable oils are not trans fats, but trans fats can be produced and processed from vegetable oils.
Trans fats are categorized into naturally occurring trans fatty acids and man-made trans fatty acids. Natural TFAs are found in beef and lamb meat and cow and lamb milk in small amounts. The trans fatty acids we usually refer to are mostly artificially produced and found in processed foods, including manufactured cream, creamer, phyllo, phyllo butter, and so on.
And although vegetable oil is not trans fat, it will produce trans fat when heated continuously at high temperature.
Therefore, it is important to pay attention to low-temperature cooking in daily life and do not overheat to avoid the production of trans fatty acids. As long as scientific cooking, you can consume vegetable oil without worry.