Still worried about the Super Size Me syndrome supposedly caused by yer favorite fast food McDonald's? Well your worries will soon be over. McDonald's Corp has announced that it has finally selected a new trans-fat-free cooking oil for its world-famous fries.

Undergoing several years of testing, the healthier new oil is now ready for use, although they haven't exactly said when all 13,700 branches will have it. Walt Riker, in behalf of the fast-food giant, says that the mystery oil is already in more than 1,200 U.S. restaurants after extensive testing, although he did not expound on any more details about it.

He did confirm, however, that the new oil is canola-based with corn and soy oils. "We're very confident in our test and taste results. We're very confident in what we're hearing back from our customers."

What spurred McDonald's to change oil, so to speak, is the New York City ordinance banning all restaurants from using artificial trans-fats. While the company has been saying that they will comply with the NY ban, they did say that it will also be a blanket overhaul for the chain, and not just its New York-based branches.