Nutrition Tips

NYC Bans Trans Fats

Medical Author: Melissa Conrad Stöppler, MD
Medical Editor: William C. Shiel Jr., MD, FACP, FACR

On December 5, 2006, the New York City Board of Health took an unprecedented step and voted to ban foods containing trans fats at all city restaurants. By July 2007, most frying oils containing artificial trans fats will be banned from restaurant use, but restaurants have another year, until July 2008, to remove all trans fat offerings.

Trans fats, also known as trans fatty acids, are generated by the chemical process of hydrogenation of vegetable oils. Hydrogenation solidifies liquid oils and increases the shelf life and the flavor stability of oils and foods that contain them. To make vegetable oils suitable for deep frying, the oils are hydrogenated, so trans fats are commonly found in deep-fried foods such as French fries and doughnuts. Other sources of trans fats are vegetable shortenings, some margarines, crackers, cookies, snack foods, and other foods. Since trans fats increase a product’s shelf life, many pre-prepared foods and mixes (for example, some pancake mixes and pizza dough) contain trans fats.