Trans fats
The least healthy fats are trans fats. Although trans fats are found in small amounts in nature, they are mostly produced for the food system by adding hydrogen to unsaturated fats to increase their stability and enable them to become solid at room temperature.
Trans fats are frequently used in packaged foods and baked goods as a less expensive but still functional substitute for butter, lard, and other more expensive ingredients. Because trans fats have harmful impacts on health, many nations, including the United States and Canada, have banned their usage in food goods. Although trans fat has been linked to poor health in recent years and is believed to contribute to visceral fat. It's important to read the nutrition label if you're unsure, even though many nations have taken steps to restrict or completely ban the use of artificial trans fats in the food supply.