COLUMBUS, Ohio &#8212 Several states have looked this year to mimic the success of cities like New York in banning artery-clogging trans fats from restaurants.

But in the 14 states that have so far proposed a ban or restriction, no bill has been passed. This month, Ohio became the 15th state to make such a proposal.

The legislation has faced strong opposition from the National Restaurant Association and its state-level affiliates – although the Massachusetts group recently said it wouldn’t fight that state’s bill.

The national association says it objects to “inflexible bans with unrealistic timetables.”

“It’s not as easy as just dumping in a new oil,” said Sheila Weiss, director of nutrition policy for the group.

A voluntary, gradual approach would “significantly diminish the impact and unintended consequences of an outright ban,” Richard Mason, lobbyist for the Ohio Restaurant Association, wrote in a letter to the sponsor of Ohio’s bill.