Watch out, junk-food lovers. The Food and Drug Administration (FDA) has given U.S. food manufacturers three years to remove all partially hydrogenated oils from their products because the agency wants to reduce consumption of artificial trans fats in foods.

Partially hydrogenated oils, a.k.a. PHOs, are formed when hydrogen gas is bubbled through oil. PHOs were originally developed in the 1950s to make processed foods last longer. But PHOs are also the main source of artificial trans fats in foods, and findings show that consumption of these fat molecules is strongly linked to a multitude of serious health issues, such as high cholesterol, coronary heart disease and heart attacks. In 2013, the FDA made a tentative decision that PHOs could no longer be considered safe for human consumption. This recent announcement finalizes that position.

For the public, this means a change in how companies will make doughnuts, ready-to-bake biscuits, frozen pizzas, coffee creamers, pie crusts and canned frosting, among many other processed foods. Companies in the United States will either have to reformulate their products without PHOs or petition the FDA to permit specific uses for the products.