Last verified 17 Sep 2026 · Sources
“Reduced calorie” (or “fewer calories”) requires at least 25% fewer calories per Reference Amount Customarily Consumed (RACC) than a named reference food (21 CFR 101.60(b)(4)), or 25% fewer per 100 g for meal or main dish products (101.60(b)(5)). It’s a relative claim, so you need a reference food, and the label has to name it and state the percentage difference right next to the claim. The trap: the claim isn’t available at all if the reference food you’re comparing against already qualifies as “low calorie”. The rule specifically blocks claiming a 25% cut off a food that was already in the low-calorie band.
| Quick facts | Reduced calorie / Fewer calories |
|---|---|
| Regulation | 21 CFR 101.60(b)(4) |
| Threshold | ≥25% fewer cal/RACC than reference food (or per 100 g meal/main dish, 101.60(b)(5)) |
| Claim type | relative |
| Reference food needed | Yes |
| Disclosure statement | Not applicable |
| Wordings FDA allows | Reduced calorie, Reduced in calories, Calorie reduced, Fewer calories, Lower calorie, Lower in calories |
What the rule says
For standalone foods, 21 CFR 101.60(b)(4) requires: “The food contains at least 25 percent fewer calories per reference amount customarily consumed than an appropriate reference food.” For meal and main dish products, 101.60(b)(5) applies the same 25% test on a per-100-g basis instead.
Both paragraphs carry the same restriction, stated in 101.60(b)(4)(iii): “Claims described in paragraph (b)(4) of this section may not be made on the label or labeling of foods if the reference food meets the definition for ‘low calorie.’” In practice, that means checking the reference food against the low calorie threshold (40 calories or less per RACC) before claiming “reduced calorie”. If it already clears that bar, the claim isn’t available against it.
FDA permits several equivalent wordings: “reduced calorie,” “reduced in calories,” “calorie reduced,” “fewer calories,” “lower calorie,” or “lower in calories.”
As with all relative claims, the general comparative-claim rules in 21 CFR 101.13(j) govern which foods can serve as the reference. Per 101.13(j)(1), the reference generally has to be a similar food (your own regular product, or a representative value for that food category drawn from market data), not an unrelated food picked because the numbers look favorable.
The numbers
The math is a straight percentage: (reference food calories − your product’s calories) ÷ reference food calories must be 25% or more, calculated per RACC (or per 100 g for meal/main dish products under (b)(5)).
The required label statement follows 21 CFR 101.13(j)(2): “The label or labeling must state the identity of the reference food and the percentage (or fraction) of the amount of the nutrient in the reference food by which the nutrient in the labeled food differs (e.g., ’50 percent less fat than [reference food]’ or ‘1/3 fewer calories than [reference food]’).” In practice that reads as “25% fewer calories than our regular tortilla chips,” placed next to the claim.
Rounding under 21 CFR 101.9(c)(1) governs what prints on each product’s Nutrition Facts panel, but the 25%-or-more comparison itself runs on the unrounded analytical values for both products. A percentage that only clears 25% after favorable rounding on both sides isn’t good enough.
If your product happens to exceed the disqualifying-nutrient thresholds under 21 CFR 101.13(h) (fat, saturated fat, cholesterol, or sodium), that separate disclosure statement requirement applies independently of the calorie claim’s own math.
On the label
Say your standard cookie has 150 calories per RACC (30 g, per 21 CFR 101.12’s cookie table), and you reformulate a lighter version at 110 calories per the same RACC. That’s a 26.7% reduction, over the 25% line, and your standard cookie is well above the 40-calorie low-calorie threshold, so the disqualifying condition doesn’t apply. The new package can read “25% Fewer Calories than Our Regular Cookies,” with that reference food identity and percentage placed next to the claim per 101.13(j)(2). See our cookies label guide for how RACC and this kind of comparison work for baked snacks.
Now say you want “reduced calorie” for a diet soda against a reference soda already at 5 calories per RACC. That reference food is already below the low-calorie line, so 101.60(b)(4)(iii) blocks the claim outright: there’s nothing left to reduce that the rule recognizes. See the soda beverages label guide.
Mistakes we see
- Comparing against a reference food that’s already low calorie. 101.60(b)(4) and (b)(5) both bar the claim outright in this case. Check the reference food’s own calorie count before doing the reduction math.
- Picking an unrepresentative or dissimilar reference food. 101.13(j)(1) requires an “appropriate” reference: generally your own regular product or a representative value for the food type, not a competitor chosen because its numbers make your percentage look bigger.
- Leaving out or burying the comparative statement. 101.13(j)(2) requires the reference food’s identity and the percentage difference in immediate proximity to the claim, not on a different panel or in fine print elsewhere.
- Basing the percentage on rounded panel numbers instead of the underlying analysis. The 25% test runs on real unrounded values; rounding under 101.9(c)(1) is a labeling display rule, not a calculation shortcut for the comparison.
- Making the claim on a small-package or 101.9(j)(4)-exempt label. Those exemptions require no nutrition claims on the label; adding “reduced calorie” ends the exemption.
Related claims
See low calorie, calorie free, light, and reduced fat, plus nutrient content claims and rounding rules.
Check your label
Our builder’s claims check evaluates your product’s numbers against these thresholds on every basis the rule names and, once you enter a reference food, tells you whether the 25% cut holds up and which exact claim wording your product qualifies for.
A reformulation you can describe as “25% fewer calories,” with the reference food named, gives shoppers a clear reason to try the lighter version. Enter your recipe, then see your label: its shape and calorie count, the claims you qualify for and your allergen line are free, no card required, and every other value and %DV stays hidden until you unlock it. $29 unlocks every other nutrient value and %DV, every FDA format your product qualifies for, and the ingredient statement and allergen declaration, ready to print. Start your label or check the low calorie threshold for your reference food.
Reduced calorie / Fewer calories claim FAQ
How much of a calorie reduction do I need for "reduced calorie"?
At least 25% fewer calories per RACC than an appropriate reference food, under 21 CFR 101.60(b)(4). For meal or main dish products it's 25% fewer per 100 g, under 101.60(b)(5).
Can I compare my reduced-calorie product to any competitor's product?
The reference food has to be an 'appropriate reference food' under 21 CFR 101.13(j): generally the same type of food you're modifying (your own regular version, or a representative market example of that food type), not an arbitrary dissimilar product.
Can I make a reduced-calorie claim if the reference food is already low calorie?
No. 21 CFR 101.60(b)(4) bars a reduced-calorie claim where the reference food already meets the definition of 'low calorie'. You can't claim a 25% reduction off a food that was already at or under the low-calorie line.
What exactly has to appear on the label with the claim?
The identity of the reference food and the percent (or fraction) the calories differ, in immediate proximity to the most prominent claim, per 21 CFR 101.13(j)(2), e.g., '25% fewer calories than our regular potato chips.'
Is a reduced-calorie claim evaluated per 50 g for small servings?
No. The per-50-g test belongs to the absolute 'low calorie' claim under 101.60(b)(2). Reduced calorie is a relative claim measured per RACC (or per 100 g for meal/main dish) against the reference food.
Related claims
Low calorie, Calorie free, Light / Lite, Reduced fat. See the full all label claims.