It's a tricky time for consumers, because the answer depends on the food — and some are losing trans fat only to hae another artery clogger take its place, that old nemesis saturated fat.

消费者需对此机警对待，因依赖于食物──一些仅仅用那古老的有害饱和——外一个动脉阻塞者来代替反义的位置。