The Oscar Mayer Deli Fresh Smoked Turkey has 1 gram of added sugar per serving. A serving is two slices. Most people don’t expect sugar in turkey. They’re also probably not alarmed by 1 gram. But turkey is served on bread, which has 2-5 grams of added sugar per two slices. The bread is spread with ketchup, which has 4 grams per tablespoon, or honey mustard, which has 5 grams per tablespoon. By the time the sandwich is assembled, someone who thought they were eating a protein-focused lunch has consumed 12-15 grams of added sugar, half to two-thirds of the AHA daily limit for women, from ingredients that don’t taste sweet.

This is the processed food sugar problem. Not the Oreos. The turkey.

Why Manufacturers Add Sugar

Sugar does several things in processed food that manufacturers value:

Palatability. Sugar enhances flavor and masks bitterness and off-notes from preservatives, soy protein, low-quality fat, and other industrial ingredients. It increases what food scientists call “craveability”. The subjective compulsion to eat more of something.

Shelf life. Sugar is hygroscopic. It attracts and binds water, making it unavailable for microbial growth. Products with higher sugar content stay fresh longer, which is critical for products distributed through long supply chains.

Texture. Sugar contributes to browning through caramelization and the Maillard reaction. It retains moisture in baked goods, preventing them from going stale. It adds body to sauces and dressings. In processed meat, it helps maintain color and contributes to the emulsification of fat and water.

Low cost. Corn-derived sweeteners, HFCS, corn syrup, maltodextrin, are cheap relative to most other ingredients. Sugar adds desirability to products at minimal cost per unit.

Low fat substitute. Following the low-fat dietary consensus of the 1980s and 90s, food manufacturers reformulated products to reduce fat. Fat contributes flavor, texture, and satiation. Sugar (and salt) replaced fat in many reformulated products.

Categories With Unexpected Sugar

Bread: Most commercial bread contains 2-5 grams of added sugar per two-slice serving. Bread labeled “wheat” or “multigrain” often contains more added sugar than white bread, as the sugar is used to mask the bitterness of whole grain. Nature’s Own Honey Wheat: 5g per two slices.

Pasta sauce: Prego Traditional: 10g added sugar per half-cup serving. Classico Tomato & Basil: 8g. Rao’s Homemade (widely marketed as lower-sugar): 3g. The standard commercial pasta sauce is adding roughly two and a half teaspoons of sugar to every serving.

Salad dressing: Kraft Thousand Island: 6g per 2 tbsp. Catalina dressing: 7g. “Light” versions often have more sugar than the originals, because removing fat requires replacing it with something.

Yogurt: Yoplait Original Strawberry: 11g added sugar per serving. Activia Strawberry: 13g. Vanilla Oikos Triple Zero: 7g (with artificial sweeteners). Plain Greek yogurt: 0g added, ~8g natural lactose.

Protein bars: Quest Bars (marketed as low sugar): 1g added sugar. Kind bars: 5-7g. Clif Bars: 17-21g. Larabars: 0g added, 10-18g natural from dates. Products marketed to health-conscious consumers span nearly the full range.

Coleslaw from KFC: 11g added sugar per serving. This is a cabbage and dressing side dish.

Canned beans: Bush’s Baked Beans: 12g added sugar per half cup. Many canned bean varieties marketed as “savory” contain 2-6g of added sugar.

Coffee drinks: Starbucks Pumpkin Spice Latte (grande, 2% milk, no whip): 50g total sugar, 49g added. Dunkin’ Caramel Swirl Latte (medium): 54g total, 51g added. These are among the highest single-serving sugar loads available in the American food environment outside of desserts.

The Ingredient List Strategy

Sugar concentration in a product’s ingredient list is often understated because manufacturers use multiple sugar sources. If a product contained only one sugar and it dominated by weight, it would appear at the top of the ingredient list. By splitting sugar across four or five forms — sugar, brown rice syrup, cane juice, dextrose, molasses, each appears lower individually.

Kashi Honey Toasted Oat cereal: sugar, brown sugar syrup, rice syrup, and oat syrup all appear in the ingredient list. Together, they total 8g of added sugar per serving, more than Lucky Charms (7g per serving).

Ultra-Processed Food and the NOVA Classification

Brazilian nutrition researcher Carlos Monteiro developed the NOVA food classification system, which categorizes foods not by their nutrient content but by the degree of industrial processing:

  • Group 1: Unprocessed or minimally processed (whole fruit, meat, eggs, milk)
  • Group 2: Processed culinary ingredients (flour, sugar, salt, oil)
  • Group 3: Processed foods (canned fish, cheese, cured meats)
  • Group 4: Ultra-processed foods (soft drinks, packaged snacks, reconstituted meat products, most breakfast cereals)

Ultra-processed foods (Group 4) are distinguished by the use of industrial ingredients not found in home kitchens — emulsifiers, flavor enhancers, stabilizers, artificial colors. And by formulation to maximize palatability. They represent approximately 60% of caloric intake in the US and account for the majority of added sugar consumption.

Several studies using NOVA classification have found that ultra-processed food consumption is associated with obesity, type 2 diabetes, cardiovascular disease, and certain cancers, independent of nutrient content, suggesting that processing itself, not just the nutrients, is part of what drives negative health outcomes.

Maltodextrin: The Caloric Non-Sugar

Maltodextrin is a partially hydrolyzed starch — chains of glucose that are shorter than starch but longer than simple sugars. It has a glycemic index higher than glucose (100+, compared to glucose’s reference of 100), meaning it raises blood sugar faster than table sugar. But because it’s technically a starch derivative, not a sugar, it doesn’t have to be listed under “Total Sugars” on a Nutrition Facts panel. Products that use maltodextrin as a primary sweetener can appear to have very low sugar content while having a substantial glycemic effect.

This is one of several technical gaps between what appears on the Nutrition Facts panel and the actual metabolic impact of a product.

Hidden Sugar in Processed Foods: Key Numbers

  • Approximately 60% of US caloric intake comes from ultra-processed food (NOVA Group 4)
  • Estimated 74% of packaged foods in US supermarkets contain added sugar (University of North Carolina study, 2016)
  • Prego Traditional pasta sauce: 10g added sugar per half-cup
  • Standard commercial bread: 2-5g added sugar per 2-slice serving
  • Nature Valley Oats & Honey granola bar: 12g added sugar per bar

Explore Further

Sources