If you spend time in GLP-1 communities, you've seen David protein bars: roughly 28 grams of protein for about 150 calories and almost no fat. That macro profile is close to too-good-to-be-true, and the ingredient that makes it possible — EPG — is exactly where the controversy lives.
What EPG actually is
EPG stands for esterified propoxylated glycerol. It's a modified, plant-based fat engineered so that your body largely doesn't digest or absorb it. Regular fat carries about 9 calories per gram; EPG contributes roughly 0.7 calories per gram. So it behaves like fat in the bar — the mouthfeel, the texture, the role fat plays in food — while contributing almost none of fat's calories. That's the trick behind the numbers on the label. EPG has received a GRAS ("generally recognized as safe") designation with the FDA.
Why GLP-1 users got interested
This isn't a coincidence. On a GLP-1, appetite drops and protein becomes the hardest target to hit — you need a lot of it in not much food. A high-protein, low-calorie, low-volume snack is almost tailor-made for that problem, which is why these bars spread fast in the community as a convenient way to close the protein gap (the same role a protein supplement plays).
The controversy: what it was really about
The flashpoint was a class-action lawsuit alleging that David bars actually contain far more fat and calories than the label states — figures cited in coverage ran as high as about 80% more calories and 400% more fat than the nutrition panel showed.
The core of the dispute is genuinely interesting, and it's about measurement, not obvious deception. Standard lab methods for measuring fat count EPG as ordinary fat — at 9 calories per gram — because chemically it is a fat. But your body doesn't absorb most of it, so the calories you actually take in are much lower. David labels the bars based on the ~0.7 calories per gram your body absorbs; a conventional lab assay "sees" the full fat weight and reports a much higher number. Both are describing the same bar with different rulers. It's a real gray area in how novel ingredients get measured and labeled, not a settled case of mislabeling.
Notably, the lawsuit was dropped in early 2026 — dismissed without a public explanation, and without any finding that the company did anything wrong. So the labeling question ended unresolved rather than decided against the brand.
The safety question that outlasts the lawsuit
Separate from the calorie math, there's a fair question about EPG itself. It carries a GRAS designation, but it's a novel ingredient with limited long-term human data — we don't have studies on what years or decades of regular consumption look like. And because it's an undigested fat passing through your gut, some people report digestive upset with it (the comparison people reach for is olestra, an older fat substitute known for GI effects — EPG is chemically different, but the "undigested fat through the gut" mechanism is similar).
One specific, dose-related effect community members report: eating too many bars in a short span can produce loose, oily, or noticeably orange stool. That's the unabsorbed fat — and the fat-soluble pigments that ride along with it — passing straight through rather than being digested. It's alarming to see, but it's the expected consequence of overdoing an undigested fat, and it usually settles once you cut back. It's the clearest signal that you've crossed your personal tolerance line.
That GI angle is the part most relevant to this audience. GLP-1 medications already come with their own gastrointestinal side effects — nausea, constipation, general gut sensitivity. Layering a fat replacer that can loosen or upset digestion on top of that is worth paying attention to, and it varies a lot person to person.
So should you eat them?
A balanced read:
- The protein is real. As a convenient protein source, the bars deliver, and the calorie-labeling debate is largely academic for a snack — by the actual-absorption mechanism, the calories you take in are low either way.
- Tolerance is individual — and dose-related. The practical question isn't the lawsuit; it's whether your gut is happy with EPG, especially while you're managing GLP-1 side effects. Spacing bars out rather than eating several a day keeps you on the right side of effects like loose or orange stool. Try one and see, rather than stocking a case first.
- Whole foods still come first. Same logic as any supplement: a bar is a useful gap-filler on a busy or low-appetite day, not a reason to skip real, protein-rich meals.
The bottom line
EPG is a clever, near-calorie-free fat replacer that makes David bars' standout macros possible. The controversy was mostly a measurement dispute over how an undigested fat should be counted, and the lawsuit was dropped without a ruling. The more durable questions are EPG's thin long-term safety record and how your own digestion handles it — including dose-related effects like oily or orange stool if you overdo it — which, on a GLP-1, is the thing actually worth testing before you rely on them.
This is general education, not medical, dietary, or legal advice. If you have a sensitive gut or GI side effects on your medication, see how a single bar sits before making it a staple.