Los Angeles ? Holy fish sticks! Scientists finally have some good news about fat in our foods.

Contrary to fears, most food manufacturers and restaurants did not just swap one bad ingredient for another when they trimmed artery-clogging trans fats from products and menus, an analysis finds.

Even the french fry, a longtime dietary scourge, got a healthier remake. But there’s still room for improvement, particularly for some items sold in supermarkets, which replaced heart-damaging trans fat with its unhealthy cousin, saturated fat.

A Harvard researcher and a consumer advocacy group examined 83 foods that had a makeover since 2006. That year the federal government began requiring food labels to list the amount of trans fat in packaged products and New York City became the first of several cities to phase them out in restaurants.

Trans fats are created when hydrogen is added to liquid oils to harden them for baking or to extend shelf life. With trans fat under attack, food makers and restaurants tinkered with various cooking oil and fat substitutes, trying not to compromise taste and texture. But how healthy are the reincarnations?

Harvard researcher Dr. Dariush Mozaffarian and the Center for Science in the Public Interest checked grocery products and restaurant chow for fat content. Items studied included margarine, junk food, baked goods and fast food from five popular chains.

The researchers did not do their own chemical testing, but instead used Food and Drug Administration databases, nutrition labels and industry brochures to determine trans fat and saturated fat levels.

Results were published in a letter in today’s New England Journal of Medicine.

Nearly all of the foods analyzed were free or mostly free of trans fat. And many companies and restaurants did not spike their saturated fat content when they cut trans fat — 65 percent of supermarket products and 90 percent of restaurant fare contained saturated fat levels that were lower, unchanged or only slightly higher than before.

“Companies almost always can reformulate their food to have a healthier balance of fats,” said CSPI executive director Michael Jacobson.

The researchers declined to provide details about the winners and sinners because they said they plan to publish the full results later. But they gave three examples:

• Large order of McDonald’s french fries: Trans fat dropped from 7 1/4 grams to zero; saturated fat went from 5 1/2 grams to 3 1/2 grams.

• Gorton’s Crunchy Golden Fish Sticks: 3 grams of trans fat per serving to zero; saturated fat unchanged at 4 grams. The package lists six sticks per serving.

• An Entenmann’s Rich Frosted Donut: 5 grams of trans fat to zero; saturated fat more than doubled from 5 grams to 13 grams.