Read a US low-fat claim with its applicable serving context
Check the reference amount and small-quantity branch behind a US low-fat claim instead of applying a universal per-serving shortcut.
Three grams of fat per serving is not a universal shortcut for deciding whether a US food can carry a low-fat claim. The relevant food category and reference amount matter. A small serving can make the printed fat amount look modest while another required comparison basis tells a different story.
Locate the reference amount first
The reference amount customarily consumed, often shortened to RACC, is a regulatory quantity. 21 CFR 101.12 sets category-specific reference amounts and explains their role in claims. Do not replace that amount with a portion you personally choose to eat.
Under 101.62(b)(2), the ordinary-food low-fat threshold is 3 g or less per RACC. For a RACC of 30 g or less, or 2 tablespoons or less, the food must also meet 3 g or less per 50 g. The rule gives an as-prepared qualification for certain dehydrated foods. Meals and main dishes instead have a separate branch requiring no more than 3 g per 100 g and no more than 30% of calories from fat.
A small-quantity example that changes the result
Assume a fictional conventional snack has an applicable RACC of 30 g, is eaten as sold and contains exactly 2 g fat per 30 g. We are stipulating the category and unrounded quantities for this exercise, not assigning a real snack to a category.
| Check | Calculation | Result |
|---|---|---|
| Per 30 g RACC | 2 g | Within the 3 g threshold |
| Per 50 g | 2 ÷ 30 × 50 | About 3.33 g, above the additional threshold |
The first check alone would miss the second result. Eating only 15 g would not remove the claim's regulatory basis; it would answer a different question about your chosen portion.
Save the missing context, not a verdict
For a real package, record the product category, applicable RACC, labeled serving and fat declaration. Keep uncertainty about classification or rounded quantities visible. A photographed panel may not provide every fact needed for a compliance determination, and other claim conditions still apply.
A low-fat statement also does not summarize the food's other nutrients or its suitability for an individual. Use it to understand a specific declared characteristic, then inspect whichever other fields matter to your shopping task.
You can explore Ingredi AI through its official Apple download or Android download. When checking label text, retain the serving context yourself rather than treating a scan as a regulatory classification.