Quick Answer
Maltodextrin has a higher glycemic index than table sugar yet can legally show 0g on nutrition labels if the serving size is small enough. It appears in keto products as a filler, coating, or processing aid. Other hidden carb sources include modified food starch, dextrose, and corn syrup solids. This is an ingredient transparency issue, not a medical claim.
Product Comparisons
We pulled ingredient lists from six products commonly marketed as keto. What we found is a pattern: the louder the "keto" branding, the more likely a filler is hiding behind the sweetener blend.
| Product Type | PQ Range | Key Concern | Sweetener | Verdict |
|---|---|---|---|---|
| Protein bar with maltodextrin coating | 18-30 | Maltodextrin listed 3rd-5th | Sucralose + maltodextrin | Skip or use sparingly |
| "Keto" cereal with corn fiber | 25-40 | Modified food starch, dextrose | Monk fruit + dextrose carrier | Read the sub-ingredients |
| MCT powder (maltodextrin-based) | 15-28 | Maltodextrin is the carrier | None listed | Defeats the purpose |
| Collagen creamer, clean formula | 60-75 | Coconut cream base, no fillers | None | Solid choice |
| Allulose-sweetened chocolate bar | 55-72 | Minimal filler, clean fat source | Allulose | Worth the price |
| Electrolyte mix with dextrose | 20-35 | Dextrose as second ingredient | Stevia + dextrose | Check the ratio |
A PQ Score is CleanKeto's ingredient quality rating on a 0-100 scale. Higher scores indicate cleaner ingredient profiles. The ranges above reflect typical formulations we have analyzed, not a single fixed number, because brands reformulate and ingredient order shifts between production runs.
Ingredients That Matter
Sixteen characters on a label can change everything about a product. Here is what to look for and why each one shifts the PQ range downward.
Maltodextrin (GI 85-105). A starch derivative, usually from corn. The maltodextrin glycemic index is higher than table sugar (GI 65), which means it spikes blood glucose rapidly. Manufacturers use it as a bulking agent, coating, or carrier for powdered fats and sweeteners. It is cheap and functional. That is the entire reason it shows up.
Dextrose (GI 100). Pure glucose by another name. Dextrose keto products often include it as a "processing aid" or carrier for flavoring. Even small amounts register on ingredient lists, but FDA rounding rules let manufacturers report 0g sugar if the per-serving amount falls below 0.5g.
Corn syrup solids (GI 75-85). Dried corn syrup. Corn syrup solids keto products use these as a cheap sweetness source or binder. Functionally similar to maltodextrin but with a slightly different sugar profile. Same blood glucose response concern.
Modified food starch. A catch-all term. The base starch could be corn, potato, tapioca, or wheat. Chemical or enzymatic modification changes its behavior in food (thickening, stabilizing) but does not remove its carbohydrate content. The word "modified" sounds technical. It is still starch.
Soluble corn fiber. Controversial. Some brands count it as pure fiber (non-digestible), but research shows partial digestion in some individuals. It often appears alongside other fillers, which is why its presence correlates with lower PQ ranges.
Polydextrose. A synthetic polymer of glucose. Used as a bulking agent in sugar-free products. Low caloric value per gram, but it is still a processed carbohydrate derivative that adds to the overall filler load of a product.
The pattern is simple. When you see multiple items from this list in one product, the PQ range drops. A single instance of maltodextrin in a minor role (tenth ingredient or later) matters less than maltodextrin as the third ingredient paired with dextrose as the fifth.
Key Takeaways
> If labels stress you out: CleanKeto turns ingredients into a simple PQ range so you can decide fast. Get it on iOS | Android
- Maltodextrin's glycemic index (85-105) exceeds table sugar's, yet FDA labeling rules allow it to appear as 0g carbs per serving when quantities fall below the rounding threshold.
- "Keto friendly" on a package is a marketing decision, not a regulated nutrition claim. No government body certifies this label.
- Hidden carbs in keto products most often come from carriers and coatings, not the primary ingredients you think you are buying.
- Reading past the nutrition panel to the actual ingredient list is the only reliable way to catch fillers like dextrose, corn syrup solids, and modified food starch.
- Products scoring in the 55-75 PQ range tend to rely on allulose, clean fats, and minimal processing aids rather than bulk fillers.
How CleanKeto Helps
The Scan feature reads an ingredient list and returns a PQ Score based on what is actually in the product. Maltodextrin, dextrose, corn syrup solids, and other fillers all factor into the calculation. The score is not a pass/fail. It is a range that reflects the overall ingredient quality so you can make a quick comparison between two products on the shelf without memorizing a chemistry textbook.
Clean keto refers to a ketogenic approach that prioritizes whole, minimally processed ingredients over anything that simply fits a macro target. CleanKeto's scoring system was built around this principle. A product can be low-carb by the numbers and still score poorly because the ingredients used to achieve that carb count are heavily processed fillers.
The Dine Out feature works differently. When you are eating at a restaurant, you do not have an ingredient list to scan. Dine Out pulls from a database of chain restaurant menu items and scores them based on known ingredient compositions, allergens, and how they align with your personal profile. If a restaurant uses maltodextrin-based sauces or coatings (many do, especially in fried items and dressings), that shows up in the scoring.
Neither feature tells you what to eat. They surface data that is otherwise buried in fine print or unavailable entirely. You make the call.