You may know there’s added sugar in your Coke or cookies. But did you know that it’s in your salad dressing, pasta sauce and bread?

The Food and Drug Administration came out Friday with its new template for nutrition labels. One big change was the addition of a line for “added sugar,” to be placed below a line for total sugar. The change is designed to distinguish between sugars that are naturally occurring in a food — like the milk sugar in a plain yogurt — and the sugars that food manufacturers include later to boost flavors — like the “evaporated cane juice” in a Chobani Kids strawberry yogurt.

A team of researchers at the University of North Carolina conducted a detailed survey of the packaged foods and drinks that are purchased in American grocery stores and found that 60 percent of them include some form of added sugar. When they looked at every individual processed food in the store, 68 percent had added sugar. Some of those products are more obvious sugary foods, but not all. The list includes many sauces, soups, fruit juices and even meat products.

You might think it’s easy to figure out whether the food manufacturer added sugar to your food, but it isn’t always so. While some foods include “sugar” in their ingredients, many use different words for products that are nutritionally similar. Most of us have heard of high-fructose corn syrup, a sugar made from processing corn. But there are also things like the “evaporated cane juice” in the yogurt, and “rice syrup” and “flo-malt,” which are less obvious and amount to the same thing.

Barry Popkin, a professor of nutrition at the University of North Carolina, and one of the paper’s authors, said that the wide variety of sugars is not always meant to confound consumers. Instead, he said, the many sugar types are chosen by food scientists to give their products the best flavor and texture. Some sugars are better for baked goods, while others are better in soft drinks. Some are also cheaper than others. Sugar tariffs and import laws make it expensive to bring in too much foreign sugar. But not all of the sugar formulations count toward the laws’ quotas.

There’s also the matter of fruit juice concentrates, which are juices that have been stripped of nearly everything but sugar and evaporated. A lot of seemingly natural foods include ingredients like “apple juice concentrate.” That’s sugar. That will be a lot clearer when the labels are updated.

“It’s going to really surprise people who go to organic and whole foods stores, when they find that all this natural food they’ve been buying is full of added sugar,” Mr. Popkin said. “It’s full of fruit juice concentrates, and they thought it was all good stuff.”