Soybean oil is a vegetable oil extracted from the seeds of the soybean (Glycine max). It is one of the most widely consumed cooking oils. As a drying oil, processed soybean oil is also used as a base for printing inks (soy ink) and oil paints.
Perhaps the main benefits of soybean oil are for food manufacturers, who are able to use cheap vegetable oils for their products. It took many years before conventional health authorities to finally warn against using trans fat.
The Food and Drug Administration (FDA) required food manufacturers to list trans fat content on the label starting January 1, 2006 — a move that essentially allows some companies to fool buyers, as any product containing up to half a gram of trans fat per serving can still legally claim to contain zero trans fat.9 It turns out that the trick is to reduce the serving size to bring it below this threshold.