U.S. Trans Fat Ban Succeeds, but Hidden Risks Still Linger in Foods

A full ban on artificial trans fats in the U.S. took effect in January 2020, marking the end of a years-long effort to remove them from the food supply. The move followed a 2015 ruling by the Food and Drug Administration (FDA) that declared partially hydrogenated oils unsafe for consumption. Since then, no other countries have introduced similar stricter regulations, despite the known health risks. The FDA first announced in 2015 that partially hydrogenated oils—the primary source of artificial trans fats—would no longer be considered 'generally recognized as safe.' This decision gave food manufacturers until 2018 to reformulate products, with a final compliance deadline in January 2020. After that date, selling foods containing these oils became illegal in the U.S.

Trans fats have long been linked to serious health problems. Studies show they raise harmful LDL cholesterol while lowering protective HDL cholesterol, increasing the risk of heart disease and inflammation. Pregnant women exposed to trans fats may also face complications, including lower birth weights in newborns. Unlike naturally occurring trans fats found in small amounts in animal products, artificial versions are created during food processing and offer no nutritional benefits. Public health experts have called the ban a major success. However, trace amounts of trans fats can still appear in some packaged foods. Labels do not list them if the quantity is below 0.5 grams per serving, so consumers must check ingredient lists for 'partially hydrogenated oil.' Health officials recommend choosing whole, unprocessed foods to avoid hidden trans fats entirely.

The U.S. remains the only country with a full ban on artificial trans fats since 2020. While the policy has reduced consumption, some processed foods may still contain small amounts. For complete avoidance, experts advise reading labels carefully and prioritising fresh, minimally processed meals.