“There are a lot of chemicals in our food supply that people have no idea are in there,” Olson said. “There are some of these artificial flavorings chemicals and artificial coloring chemicals. Some of them pose a cancer risk, others pose risk to developing children.”

Right now, it can be tough to know if a product truly has no trans fats. That’s because products with less than half a gram per serving can still say zero on the nutrition label.

That won’t be allowed in three years. But for now, the FDA suggests checking the ingredients label.