When 28 grams of protein and 150 calories made a viral brand, a lawsuit argues that does the math really add up?
The protein bar market is driven by the numbers. Calories, grams of protein, and grams of fat often determine which products consumers choose. For people tracking macros, managing weight, or fueling workouts, nutrition labels aren’t the only source of information. This is the selling point.
These numbers are now at the center of a legal battle.
A class action lawsuit against David Protein claims the company misrepresented the calorie and fat content of its viral protein bars. The plaintiffs claim that laboratory tests show that the bars contain significantly more calories and fat than advertised on the package. The case has drawn attention in the fitness industry, where consumers often rely on accurate nutrition labels to guide purchasing decisions.
Claims behind the lawsuit
David’s Protein Bars gained popularity because of a simple promise. Each bar claims 28 grams of protein, zero grams of sugar, two grams of fat, and 150 calories. In a category where most protein bars are between 200 and 280 calories, this ratio helped the product stand out from the competition.
filed in New York federal court, arguing that those numbers may not reflect the bar’s true nutritional content.
According to the complaint, independent testing at an FDA-accredited laboratory measured between 268 and 275 calories per bar, nearly 80 percent higher than the advertised 150 calories. Tests reportedly found 11 to 13.5 grams of fat, more than 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 20 percent of the labeled value. For a product labeled as containing 150 calories, this tolerance would allow approximately 180 calories.
The lawsuit argues that the alleged lab results widely exceed that threshold.
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The plaintiffs argue that the low calorie count is at the center of the brand’s marketing. David’s protein bars typically retail for $3 to $4 each, putting them near the high end of the protein snack market. According to the complaint, consumers were willing to pay this price because they believed the bars offered unusually high amounts of protein with significantly fewer calories than competing products.
A brand is built on a single statistic
The legal challenge comes as David Protein experiences rapid growth in the protein snack market.
The company, co-founded by Peter Rahal, who previously helped launch the protein bar brand RXBar, was later acquired by Kellogg in 2017 for around $600 million. Rachel launched David Protein in 2024, promoting a bar with 28 grams of protein for just 150 calories.
Fitness influencers quickly spread the claim on TikTok, YouTube and other social platforms where calorie tracking and macro counting dominated nutrition discussions.
Demand for high-protein foods has also increased as consumers focus on muscle growth, weight management, and structured nutrition plans. This trend has been accelerated by the increasing use of GLP-1 drugs such as Ozympic and Vigovi, which often require high protein intake to maintain muscle mass while cutting calories.
Industry reports estimate the company’s valuation to be close to $725 million, making it one of the fastest-growing startups in the protein snack market.
Company response
David Proton denies the allegations and argues that the case relies on a flawed method for measuring calories.
In a statement responding to the lawsuit, the company said the claims contained false information about how calories were calculated in accordance with federal nutrition labeling rules.
“The claim that claims David’s Protein Bars contain more calories and fat than stated on their nutrition labels,” the company said.
The controversy centers on bomb calorimetry, a laboratory method mentioned in the trial. This technique measures the total energy contained in the food by placing the sample in a sealed chamber and burning it to measure the heat released. Scientists often use this method to determine the gross energy stored in matter. However, this measure 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 some of the ingredients used in the bars.
The company specifically refers 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 less of the compound, federal labeling rules designate it as having a lower caloric value.
Under Food and Drug Administration guidelines, manufacturers calculate calories based on metabolizable energy rather than total energy measured through combustion tests. Company representatives argue that treating EPG like conventional fat artificially inflates the calorie count.
Founder Peter Rahal has publicly defended the product and said the company intends to sue.
What happens next?
The case remains in the early stages, and the court has not yet ruled on the claims.
If the trial goes ahead, the central issue will likely be how to measure calories for ingredients like EPG. Experts may debate whether laboratory combustion testing or metabolizable energy calculations better reflect federal labeling standards.
For consumers, the controversy highlights a broader issue in the health food industry. As brands market products around accurate nutritional statistics, even small disagreements about how to measure those numbers can turn into legal battles.
For now, David’s protein bars remain on the market while the case goes to court.
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