California restaurant owners must change their frying oils to abide by a newly passed law which outlaws the use of trans fats

California has become the first U.S. state to ban trans fats, a type of unsaturated fat that has been shown to clog arteries.  

Doctors are applauding the decision, but some residents complain that the government is interfering with their freedom. 

VOA's Carolyn Presutti takes us to the controversy.