Sodium Nutrition Label Requirements
Sodium can go wrong in four places at once: the declaration, the rounding ladder, the percent Daily Value and the front-panel claim. Each one worked through, including the trap that sits exactly at 140 mg.
Sodium nutrition label requirements can go wrong in four separate places at once: the declaration, the rounding, the percent Daily Value, and the claim on the front of the pack. Sodium is mandatory under 21 CFR 101.9(c)(4), it has a fixed position in the panel, it uses a rounding ladder no other nutrient shares, and its front-panel claims get a dedicated regulation, 21 CFR 101.61.
Two things are out of scope. The arithmetic of turning milligrams into a percentage is covered in how to calculate percent Daily Value, and FDA's voluntary reduction goals, which are guidance rather than a labeling requirement, are covered in FDA sodium reduction targets. What follows is only the binding part.
Sodium nutrition label requirements start with a mandatory declaration
21 CFR 101.9(c) lists the nutrients a Nutrition Facts panel must contain, and sodium is item (c)(4). The order in the regulation is the order on the panel: calories, total fat, saturated fat, trans fat, cholesterol, sodium, total carbohydrate, dietary fiber, total sugars, added sugars, protein, then vitamin D, calcium, iron and potassium. Sodium sits below cholesterol and above total carbohydrate, and there is no standard panel where it moves.
Three format points follow from 101.9(d). Sodium is not indented, so 101.9(d)(1)(iv) requires it in bold or extra bold type alongside Calories, Total Fat, Cholesterol, Total Carbohydrate and Protein. Under 101.9(d)(7)(i) the name is followed immediately by the amount by weight with the unit appended, and for sodium that unit is always milligrams, written "mg"; "<" may replace "less than". And 101.9(d)(8) separates the vitamins and minerals block by a bar, covering vitamins and minerals "except sodium": sodium is a mineral in chemistry but not in panel layout, and stays in the food components block.
The sodium rounding ladder, and the trap at 140 mg
21 CFR 101.9(c)(4) gives sodium a three-step ladder:
| Amount per serving | Declare as | Example |
|---|---|---|
| Less than 5 mg | Zero | 3.6 mg declares as 0 mg |
| 5 mg to 140 mg | Nearest 5 mg increment | 118 mg declares as 120 mg |
| Greater than 140 mg | Nearest 10 mg increment | 487 mg declares as 490 mg |
The interesting behaviour is at the seam. A serving analysed at 138 mg is in the middle band, rounds to the nearest 5 mg and declares 140 mg. A serving at 142 mg is in the top band, rounds to the nearest 10 mg and also declares 140 mg. Identical printed lines, and only one can carry a low sodium claim, because 101.61(b)(4) tests the sodium the food actually contains per reference amount, not the number you printed.
The bottom of the ladder behaves the same way. A serving at 4.9 mg declares as 0 mg and is below the "less than 5 mg" line in 101.61(b)(1)(i); one at exactly 5.0 mg declares as 5 mg and is not. A 0 mg declaration still does not buy sodium free on its own, because that claim carries a second condition about ingredients.
The percent Daily Value is required, and it is always a whole percent
Sodium has a Daily Reference Value, so 101.9(d)(7)(ii) requires a figure in the % Daily Value column on the sodium row, to the nearest whole percent, with none of the stepped increments vitamins and minerals use. It also lets you divide either the declared amount or the actual amount before rounding; pick one and use it everywhere.
The DRV table in 101.9(c)(9) sets sodium at 2,300 mg for adults and children 4 years and older and for pregnant and lactating women, 1,500 mg for children 1 through 3 years, and not applicable for infants through 12 months. Under 101.9(j)(5)(ii)(A), labels for foods represented as specifically for infants through 12 months declare sodium in milligrams but carry no percent Daily Value and no footnote. Toddler labels do carry a sodium percentage, against 1,500 mg.
Why "Not a significant source of sodium" is not available to you
Some nutrients can be dropped from the panel and replaced with a line at the bottom of the table. Under 101.9(c)(3), a product with less than 2 mg of cholesterol per serving and no fat, fatty acid or cholesterol claim may omit the declaration and print "Not a significant source of cholesterol" instead; vitamin D, calcium, iron and potassium get a similar route under 101.9(c)(8)(iii) below 2 percent of the RDI. Sodium has no such provision. There is no "declaration is not required" clause anywhere in 101.9(c)(4), so below 5 mg you declare zero.
The simplified format does not help, and this is commonly misread. 101.9(f) allows that format when a product contains insignificant amounts of eight or more listed nutrients, and 101.9(f)(1) defines an insignificant amount as one that allows a declaration of zero, so a very low sodium product can count sodium toward the eight. But 101.9(f)(2)(i) then requires the simplified format to include total calories, total fat, total carbohydrate, protein and sodium in every case. The "Not a significant source of ________" statement in 101.9(f)(4) names only nutrients that were left out, and sodium was never allowed to be left out. A panel reading "Not a significant source of sodium" is not compliant.
The binding claim definitions in 21 CFR 101.61
101.61(a) sets three gates before any sodium claim is legal: it must use one of the terms defined in the section in accordance with its definition, comply with 101.13, and sit on a food labeled under 101.9, 101.10 or 101.36. Every individual-food test below is measured per reference amount customarily consumed, so establish the RACC first; our RACC lookup covers the categories in 21 CFR 101.12.
| Claim | Individual foods | Meals and main dishes |
|---|---|---|
| Sodium free, 101.61(b)(1) | Less than 5 mg per RACC and per labeled serving, plus the ingredient condition | Less than 5 mg per labeled serving |
| Very low sodium, 101.61(b)(2) and (b)(3) | 35 mg or less per RACC, and per 50 g for a small RACC | 35 mg or less per 100 g |
| Low sodium, 101.61(b)(4) and (b)(5) | 140 mg or less per RACC, and per 50 g for a small RACC | 140 mg or less per 100 g |
| Reduced sodium, 101.61(b)(6) and (b)(7) | At least 25% less sodium per RACC than an appropriate reference food | At least 25% less per 100 g |
| Salt free, 101.61(c)(1) | Only if the food is sodium free | Same test |
| Unsalted, without added salt, no salt added, 101.61(c)(2) | No salt added in processing, and the food it resembles and substitutes for is normally processed with salt | Same test |
Each definition licenses a family of wordings: sodium free also covers no sodium, zero sodium, without sodium and trivial, negligible or dietary insignificant source of sodium; low sodium also covers little sodium and low source of sodium; reduced sodium also covers less sodium and lower sodium.
The 50 g second test. Where the RACC is 30 g or less, or 2 tablespoons or less, 101.61(b)(2)(i)(B) and (b)(4)(i)(B) require the food to meet the threshold per RACC and per 50 g. A cracker with a 30 g RACC at 130 mg passes the first test and fails the second, because 50 g of it carries about 217 mg. For dehydrated foods reconstituted with water, the 50 g criterion applies to the "as prepared" form.
The sodium free ingredient condition. 101.61(b)(1)(ii) adds a test unrelated to milligrams: no ingredient may be sodium chloride or something consumers understand to contain sodium, unless it carries an asterisk pointing to a line below the ingredient list reading "Adds a trivial amount of sodium" or "adds a dietarily insignificant amount of sodium".
The ceiling on the reference food. 101.61(b)(6)(iii) and (b)(7)(iii) prohibit a reduced sodium claim where the reference food already meets the definition for low sodium. You cannot advertise a 25% cut off an already low base.
Inherently low foods must say so. Where a food meets the condition without special processing, alteration, formulation or reformulation, 101.61(b)(1)(iii), (b)(2)(ii) and (b)(4)(ii) require the label to refer to all foods of that type rather than to your brand: "leaf lettuce, a sodium free food", "fresh spinach, a low sodium food".
Two terms usually listed alongside these are not in 101.61 at all: light in sodium and lightly salted are defined in 21 CFR 101.56, which sets light in sodium at at least 50% less sodium than the reference food. Check a claim against the regulation that defines it; our claim validator runs a product's numbers against the defined terms.
101.61(c) is also explicit that salt is not synonymous with sodium: salt means sodium chloride, and references such as "unsalted", "no salt" and "no salt added" are potentially misleading. It then defines "unsalted", "without added salt" and "no salt added"; the bare phrase "no salt" is named in the warning but is not a defined term.
What a sodium claim drags onto the rest of the label
- The disclosure statement, 101.13(h)(1). Where an individual food contains more than 480 mg of sodium per RACC, per labeled serving, or per 50 g where the RACC is 30 g or less or 2 tablespoons or less, the label must bear "See nutrition information for sodium content". The trigger is any nutrient content claim, not only a sodium claim, so a low fat flag on a 600 mg sodium product pulls it in. The levels are more than 960 mg per labeled serving for a meal product, 101.13(h)(2), and more than 720 mg for a main dish product, 101.13(h)(3). Under 101.13(h)(4) it is boldface, immediately adjacent to the claim with no intervening material, no smaller than the type 101.7(i) requires for the net quantity statement and never below one-sixteenth of an inch, and it repeats on every panel carrying the claim except the one bearing the nutrition information.
- The reduced sodium comparison, 101.61(b)(6)(ii). Two statements, not one. The reference food's identity and the percent or fraction by which sodium differs go in immediate proximity to the most prominent claim: "reduced sodium ______, 50 percent less sodium than regular ______". Quantitative information comparing the labeled serving with the reference food then goes adjacent to that claim or to the nutrition label: "Sodium content has been lowered from 300 to 150 mg per serving."
- The unsalted disclosure, 101.61(c)(2)(iii). Where an unsalted, without added salt or no salt added product is not itself sodium free, "not a sodium free food" or "not for control of sodium in the diet" must appear adjacent to the nutrition label, or elsewhere on the information panel per 101.2. The carve-out, 101.61(c)(3), is a factual taste statement on a food for infants and children under 2.
- Bare amounts and type size. Under 101.13(i)(2) a figure implying a level without meeting a definition needs an adjacent disclaimer, in the regulation's own sodium example: "only 200 mg sodium per serving, not a low sodium food." Under 101.13(f) no claim may be larger than twice the statement of identity.
- Loss of exemption. The exemptions in 101.9(j) are conditional on the food bearing no nutrition claims or other nutrition information anywhere on the label, in labeling or in advertising. A sodium claim brings the product into full nutrition labeling.
FDA measures against your declared value
21 CFR 101.9(g) defines how the declared number is tested. A lot is a collection of primary containers or units of the same size, type and style produced under conditions as nearly uniform as possible, identified by a common container code or, failing that, a day's production. Under 101.9(g)(2) the sample is a composite of 12 subsamples, one from each of 12 randomly chosen shipping cases, analysed by the appropriate AOAC methods.
The test that names sodium is 101.9(g)(5), and it runs in one direction. A food declaring sodium is misbranded under section 403(a) of the act if the composite comes in greater than 20 percent in excess of the declared value, subject to a proviso for excesses smaller than the recognised variability of the analytical method at that level. 101.9(g)(6) accepts reasonable deficiencies of sodium below the labeled amount within current good manufacturing practice.
So under-declaring is the expensive mistake and over-declaring is not. Declare 140 mg and a composite at 168 mg is at the ceiling; anything above is misbranding exposure. Declare 200 mg on a product analysing at 150 mg and the compliance rule does not object, though the claim rules still will if you used that headroom. Under 101.9(g)(7) compliance is based on the metric measure in your serving size statement, so a wrong gram weight corrupts the sodium test with everything else.
Build the panel from the analytical value, apply the 101.9(c)(4) ladder once at the end, and keep enough margin under the declared figure that batch variation cannot push a composite past 120 percent of it. The nutrition label generator applies the sodium ladder and the 2,300 mg percent Daily Value automatically and puts sodium in its required position in the panel.
Frequently asked questions
Does every panel have to declare sodium, even when there is none?
Yes. Sodium is mandatory under 21 CFR 101.9(c)(4), and that paragraph has no provision allowing the declaration to be dropped. Below 5 mg per serving you declare zero. Compare cholesterol, where 101.9(c)(3) allows omission below 2 mg absent fat, fatty acid or cholesterol claims.
My lab says 142 mg per serving and the panel prints 140 mg. Can I say low sodium?
No. 101.61(b)(4) tests the sodium the food contains per reference amount, and 142 mg is above the 140 mg line. The printed 140 mg comes from the 101.9(c)(4) rule that amounts above 140 mg round to the nearest 10 mg increment: a display convention, not the compliance value. Reformulate or drop the claim.
What is the difference between unsalted and sodium free?
Sodium free is a quantity test: less than 5 mg per reference amount and per labeled serving, plus the ingredient condition in 101.61(b)(1)(ii). Unsalted is a process test: no salt added during processing, applied to a food that resembles and substitutes for one normally processed with salt. An unsalted product can carry a lot of naturally occurring sodium, which is why 101.61(c)(2)(iii) requires the "not a sodium free food" statement when it is not. Salt free is different again: 101.61(c)(1) permits it only where the food meets the sodium free definition.
Is "light in sodium" defined in 101.61?
It is not. 101.61 covers sodium free, very low sodium, low sodium, reduced sodium, salt free and the unsalted family. Light in sodium and lightly salted are defined in 21 CFR 101.56, which sets light in sodium at at least 50% less sodium than the reference food. Both are relative claims, so the reference food rules in 101.13(j) apply.
How far above my declared sodium can a lab result go before it is a violation?
Under 101.9(g)(5) a composite of 12 subsamples coming in more than 20 percent above the declared value renders the food misbranded, with a proviso for excesses smaller than the recognised variability of the method. There is no matching floor: 101.9(g)(6) accepts reasonable deficiencies below the labeled amount within good manufacturing practice.
