Consumer Lab Exposes Label Issues In Protein, Nut, And Energy Bars

by | Oct 15, 2025

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Dr. Marion Nestle, longtime NYU professor of nutrition, food studies, and public health, with additional faculty roles at UC San Francisco and Cornell, is best known for analyzing the intersections of food, politics, and health, often exposing how government policy, corporate lobbying, and food industry marketing shape what we eat.

Protein bars: Consumer Lab testing does not please manufacturers

I’m indebted to Consumer Lab for its testing and discussion of Protein, Energy, and Nut Bars.  

Full disclosure: I don’t like these products much. I don’t like their soft texture or off flavors. The Environmental Working Group doesn’t much like them either, mainly because they are ultra-processed, contain artificial sweeteners, and are highly caloric.

Consumer Lab’s tests found some of these bars to contain more fat, carbs, and/or sugar alcohols than listed on their labels. The test results are in CL’s Nutrition Bars Review of bars from AlohaBarebellsClif BarDavidGoMacroIQ BarKindKirklandLarabarPerfect BarPure ProteinRxBar, and Quest.

CL is particularly concerned about the sugar alcohols commonly used in high-protein bars.

The distributor of one of the David bars deemed by CL as not approved (nearly five times as much fat as on the label and, therefore, more calories) argued that CL had used the wrong testing method.

At issue is the number of calories provided by the ingredient, esterified propoxylated glycerol (EPG), a poorly digested fat substitute. CL thought it should be labeled and its calories counted. The distributor disagreed.

CL says “EPG is a way to add fat to a protein bar (making it less dry), while hiding most of this fat and possible calories from the label. But we think this is dishonest to consumers…”  It then goes on to discuss the potential binding of EPG to fat-soluble vitamins and causing oily urine and stools. It wants amounts of EPG disclosed on labels.

Comment: The FDA says EPG is GRAS. While the arguments about its calories continue, my bottom line is simple. EPG is a marker of ultra-processing. I would just as soon avoid it.

The post Protein bars: Consumer Lab testing does not please manufacturers appeared first on Food Politics by Marion Nestle.

Feature Image Credit: Freepik

About Marion Nestle

Marion Nestle is Paulette Goddard Professor of Nutrition, Food Studies, and Public Health, Emerita, at New York University, which she chaired from 1988-2003 and from which she officially retired in September 2017. She is also Visiting Professor of Nutritional Sciences at Cornell. She earned a Ph.D. in molecular biology and an M.P.H. in public health nutrition from the University of California, Berkeley, and has been awarded honorary degrees from Transylvania University in Kentucky (2012) and from the City University of New York’s Macaulay Honors College (2016). In 2023, she was awarded The Edinburgh Medal (for science and society).

Marion Nestle headshot.

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