Is sourdough bread actually ultraprocessed? Here’s how to tell

Spot the difference at the store before you take it home.

Key Points

• To make healthier choices, learn to spot the difference between traditional sourdough and ultra-processed versions.
• Traditional sourdough uses only flour, water, salt, and a natural starter, with a slow fermentation process for flavor.
• Ultra-processed sourdough often includes additives like commercial yeast, preservatives, and dough conditioners to mimic traditional bread.

As the sourdough bread craze continues, more companies are producing their own loaves for shoppers to try. Sourdough has earned a reputation as a healthier, “better-for-you” option, but not all loaves are created equal. To choose wisely, you need to know how to spot traditional sourdough versus ultra-processed versions. The difference comes down to how it’s made.

Traditional sourdough relies on a short list of ingredients and a slow fermentation process, while some store-bought versions use shortcuts to mimic its signature flavor and texture. We spoke with experts to explain how to tell whether your sourdough is truly minimally processed and what to look for before adding it to your cart.

Meet Our Expert

• Lisa Moskovitz, RD, founder of NY Nutrition Group, and author of The Core 3 Healthy Eating Plan
• Nels Leader, CEO of Bread Alone, a certified organic sourdough bread company
• Jessica Gavin, certified food scientist and culinary scientist

Related: What Eating Sourdough Does for Your Body, According to Nutrition Experts

What ‘Ultraprocessed’ Really Means

We often hear about ultra-processed foods in a negative light, especially when it comes to bread—and that perception extends to sourdough. “Typically, ultraprocessed means that the flour was degraded down and stripped of all of its nutrients and then put back together with additives and preservatives,” says Lisa Moskovitz, RD, and founder of NY Nutrition Group.

According to the NOVA classification system, ultra-processed foods—including packaged breads—fall into Group 4. These foods are industrial products made with multiple ingredients, including additives such as emulsifiers, preservatives, and modified starches. Manufacturers often synthesize these ingredients in laboratories to create convenience, extend shelf life, and maintain a consistent texture, says Jessica Gavin, a certified food scientist and culinary scientist.

However, bread exists on a processing spectrum. “A simple loaf made with flour, water, yeast, and salt is considered processed (Group 3) because it’s still recognizable and traditionally made,” Gavin says. “In contrast, many packaged breads are ultra-processed due to added sugars, oils, preservatives, and dough conditioners.”

Is Sourdough Bread Ultra-Processed?

Because traditional sourdough consists of flour and water and ferments through the action of yeast and lactic acid bacteria, it typically falls on the less-processed end of the spectrum. Bakers rely on flour, water, salt, and a natural starter, using fermentation—rather than additives—to develop flavor and structure, Gavin says. Because it’s not ultra-processed, sourdough has gained popularity among health-conscious consumers, Moskovitz adds.

However, as sourdough’s popularity has grown, some bread companies have turned to pre-made sourdough flavors and ingredients instead of traditional fermentation, says Nels Leader, CEO of Bread Alone. This shift has led to concerns about so-called “sourfaux” products among consumers.

“These ingredients are essentially commercial yeast dressed up as sourdough,” Leader explains. “They allow bakers to very easily create a product that can be labeled ‘sourdough’ with a short fermentation process, yielding a product with at best some sour flavor notes but without the functional or nutritional benefits.”

When shopping for sourdough, it can be difficult to tell whether a loaf is truly traditional or made with shortcuts, especially when reading a label on a packaged loaf, Leader adds. To ensure you are getting authentic sourdough, look for trusted bakeries and brands that rely on traditional fermentation methods.

How to Tell If Your Sourdough Bread Is Ultra-Processed

The key differences between traditional sourdough and ultra-processed versions come down to fermentation and formulation. Traditional sourdough uses a natural starter and a long fermentation process to develop flavor, texture, and digestibility without additives, Gavin says. Mass-produced sourdough meets high demands by using commercial yeast, shorter fermentation times, and added acids or dough conditioners to mimic sour flavor and extended shelf life, she adds.

To determine whether store-bought sourdough is ultra-processed, Leader recommends starting with your sense of smell. “If there is a chemical or ‘off’ odor, that’s probably mold inhibitor,” he says. “Once your nose is trained to detect it, you’ll never taste bread the same way again.”

Next, assess the texture. The bread should feel pliable, not brittle. “Fermentation builds strength in the dough, creating a slice that should be tender with some pliability,” Leader says. “As a sourdough loaf ages, it will lose some softness as moisture migrates out of the loaf.” A slice shouldn’t feel overly soft or pillowy, which often signals the use of emulsifiers and shelf-life extenders.

Finally, taste the bread. Authentic sourdough has a tangy flavor from natural fermentation, along with a chewy texture and an open crumb with irregular air pockets, Gavin says. Ultra-processed sourdough tends to have a milder flavor and a more uniform texture.

Tips

Don’t stress if the only sourdough available—or affordable—is a more processed option. Nutrition isn’t all-or-nothing, and ultra-processed sourdough can still fit into a balanced diet, especially if it helps you stay within your budget and meet your needs. Focus on the bigger picture: pairing your bread with fiber-rich fillings, healthy fats, or protein can boost the overall quality of your meal. When possible, choose minimally processed versions—but when that’s not realistic, enjoying what’s accessible to you is still a perfectly valid and practical choice.

Identifying Ultra-Processed Ingredients

When shopping for sourdough bread, you can often tell whether it’s ultra-processed before you even take it home by checking the ingredient list. Ultra-processed sourdough typically has a softer crumb that you may feel through the plastic packaging, and it often includes ingredients such as commercial yeast, preservatives, added sugars and oils, and dough conditioners, Gavin says. Manufacturers use these ingredients to speed up production and extend shelf life.

Leader says certain additives can also signal faux sourdough. Mold inhibitors—often listed as calcium propionate—are a key red flag. “Watch out for ‘cultured wheat,’ ‘cultured wheat starch,’ or even ‘organic cultured wheat.’ Sounds delicious, right? Wrong!” he says. These ingredients strip sourdough bread of its flavor and nutrition.

Traditional, minimally processed sourdough should contain only flour, water, salt, and a sourdough starter, Gavin says. A short ingredient list signals a true sourdough loaf—one that delivers the flavor and nutritional value it’s known for.

Read the original article on Martha Stewart