Protein Bar Lawsuit Questions Viral 150-Calorie Claim

When 28 grams of protein and 150 calories built a viral brand, a lawsuit argues whether the math really adds up

The protein bar market runs on numbers. Calories, grams of protein, and grams of fat often determine which products consumers choose. For people tracking macros, managing weight, or fueling workouts, the nutrition label is not just a source of information. It is the selling point.

Those numbers are now at the center of a legal fight.

A class action lawsuit filed against David Protein alleges the company misrepresented the calorie and fat content of its viral protein bars. Plaintiffs claim laboratory testing shows the bars contain significantly more calories and fat than the packaging advertises. The case has drawn attention across the fitness industry, where consumers often rely on precise nutritional labels to guide purchasing decisions.

The Claims Behind the Lawsuit

David’s Protein Bars gained popularity because of a simple promise. Each bar advertises 28 grams of protein, zero grams of sugar, two grams of fat, and 150 calories. In a category where many protein bars contain between 200 and 280 calories, that ratio helped the product stand out from competitors.

The lawsuit, filed in federal court in New York, argues those numbers may not reflect the bar’s actual nutritional content.

According to the complaint, independent testing conducted at an FDA-accredited laboratory measured between 268 and 275 calories per bar, roughly 80 percent higher than the advertised 150 calories. The testing also reportedly found 11 to 13.5 grams of fat, far above the two grams listed on the label.

Federal regulations allow some variation in nutrition labeling, but the margin is limited. Under Food and Drug Administration guidelines, the actual nutrient content of packaged foods generally cannot exceed the labeled value by more than about 20 percent. For a product labeled as containing 150 calories, that tolerance would allow roughly 180 calories.

The lawsuit argues the alleged laboratory results exceed that threshold by a wide margin.

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Plaintiffs argue the low calorie count sits at the center of the brand’s marketing. David Protein bars typically retail for about $3 to $4 each, placing them near the higher end of the protein snack market. According to the complaint, consumers were willing to pay that price because they believed the bars offered an unusually high amount of protein with significantly fewer calories than competing products.

A Brand Built on a Single Statistic

The legal challenge comes as David Protein experiences rapid growth in the protein snack market.

The company was co-founded by Peter Rahal, who previously helped launch the protein bar brand RXBar, later acquired by Kellogg’s in 2017 for about $600 million. Rahal launched David Protein in 2024, promoting a bar with 28 grams of protein for only 150 calories.

Fitness influencers quickly amplified the claim across TikTok, YouTube, and other social platforms where calorie tracking and macro counting dominate nutrition discussions.

Demand for high-protein foods has also surged as consumers focus on muscle growth, weight management, and structured nutrition plans. The trend has accelerated alongside the growing use of GLP-1 medications such as Ozempic and Wegovy, which often require higher protein intake to maintain muscle mass while reducing calories.

Industry reports estimate the company’s valuation has approached $725 million, making it one of the fastest-growing startups in the protein snack market.

The Company’s Response

David Protein denies the allegations and argues that the lawsuit relies on the wrong method for measuring calories.

In a statement responding to the case, the company said the claims misunderstand how calories are calculated under federal nutrition labeling rules.

“The lawsuit alleging that David Protein bars contain more calories and fat than stated on their nutrition labels is simply wrong,” the company said.

The dispute centers on bomb calorimetry, the laboratory method cited in the lawsuit. The technique measures the total energy contained in food by placing a sample in a sealed chamber and burning it to measure the heat released. Scientists often use the method to determine the gross energy stored in a substance. However, that measurement reflects the total potential energy in the food rather than the amount of energy the human body actually absorbs during digestion.

David Protein argues that this method does not reflect how the human body metabolizes certain ingredients used in the bars.

The company points specifically to EPG, or esterified propoxylated glycerol, a fat substitute designed to mimic the taste and texture of fat while providing far fewer digestible calories. Because the body absorbs little of the compound, federal labeling rules assign it a lower caloric value.

Under Food and Drug Administration guidelines, manufacturers calculate calories based on metabolizable energy rather than the total energy measured through combustion testing. Company representatives argue that treating EPG like a conventional fat artificially inflates the calorie count.

Founder Peter Rahal has publicly defended the product and said the company intends to contest the lawsuit.

What Happens Next

The case remains in its early stages, and the court has not yet ruled on the claims.

If the lawsuit moves forward, the central issue will likely be how calories should be measured for ingredients such as EPG. Experts may debate whether laboratory combustion testing or metabolizable energy calculations better reflect federal labeling standards.

For consumers, the dispute highlights a broader issue within the health food industry. As brands increasingly market products around precise nutritional statistics, even small disagreements over how those numbers are measured can turn into legal battles.

For now, David Protein bars remain on the market while the case moves through the courts.