December 28, 2009 7:29 AM

War on fat: California trans-fat ban goes into effect Friday

California will bar restaurants from cooking with trans fat beginning New Year's Day, becoming the first state to crack down on the substance tied to clogged arteries, strokes and coronary heart disease. The ban is hailed by supporters as a way to protect diners who routinely have not been aware of consuming trans fat at some restaurants because they don't see the meals cooked or the ingredients used.

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