The Nutrition Facts label is the FDA-mandated panel that declares a food's serving size and nutrient content in a fixed format under 21 CFR 101.9. The updated design, phased in by 2021, enlarges calories, bases serving size on amounts people actually eat, and adds a separate line for added sugars.
Most packaged foods sold in the U.S. carry this panel, and its format is not a design choice, it is regulation, down to the type sizes and the order of the lines. This guide covers the updated format, how serving size is set from the RACC, the mandatory nutrients, how added sugars and rounding work, and who qualifies for a small-business exemption. Every rule below traces to 21 CFR 101.9; verify against the current text before finalizing a label.
What is the Nutrition Facts label?
The Nutrition Facts label is a standardized panel required on most packaged foods that tells a consumer, per serving, how many calories the food provides and how much of specified nutrients it contains, along with each nutrient's percent Daily Value. It was created by the Nutrition Labeling and Education Act of 1990 and codified at 21 CFR 101.9, which spells out mandatory content, format, type sizes, and rounding. The FDA finalized a major redesign in 2016; the panel you see today is that updated version.
The label is a food-safety-adjacent legal document, not marketing copy. An inaccurate panel, a wrong serving size, a missing added-sugars line, an undeclared nutrient, is a labeling violation that can trigger a recall, the same as an undeclared allergen. That is why label content lives under the same GMP and change-control discipline as the rest of the plant's records.
What changed in the updated Nutrition Facts format?
The 2016 redesign changed both what the label says and how it looks. The headline changes:
- Calories are bigger and bolder enlarged to the most prominent line on the panel.
- Serving sizes were updated to reflect what people actually eat now, which for many products increased the declared serving.
- Added Sugars is a new mandatory line declared in grams and as a percent Daily Value, indented under Total Sugars.
- The required vitamins and minerals changed: Vitamin D and potassium are now mandatory with actual amounts, calcium and iron remain, and Vitamins A and C moved to voluntary.
- The footnote explaining percent Daily Value was rewritten for clarity.
Compliance was phased by company size. Manufacturers with $10 million or more in annual food sales had to comply by January 1, 2020; those with less than $10 million had until January 1, 2021. Both dates have passed, so the updated format is the baseline for any label today.
How is serving size determined?
Serving size is not chosen by the manufacturer, it is derived from the Reference Amount Customarily Consumed (RACC) a table of amounts people typically eat per occasion, published at 21 CFR 101.12. You find your product's category in the RACC table, then express the serving in a household measure (cups, pieces, tablespoons) plus the metric weight. Because the RACC is fixed by regulation, two competing products in the same category declare comparable servings, which is the whole point, the label is meant to let shoppers compare.
Two rules follow from the RACC that catch people out. A package that holds between roughly one and two RACCs, a 20-ounce soda, a small bag of chips, must generally be labeled as a single serving, because people tend to finish it in one sitting. And packages holding two to three servings that could be consumed in one or multiple sittings must carry a dual-column label showing both “per serving” and “per package” amounts.
Which nutrients are mandatory?
The updated panel requires a fixed set of nutrients in a fixed order. Mandatory declarations are: Calories, Total Fat, Saturated Fat, Trans Fat, Cholesterol, Sodium, Total Carbohydrate, Dietary Fiber, Total Sugars, Added Sugars, Protein, and the four micronutrients Vitamin D, Calcium, Iron, and Potassium each of the four now declared as an actual amount plus a percent Daily Value. Vitamins A and C are no longer required but may be declared voluntarily. Nutrients present at insignificant amounts can sometimes be omitted or shown in a simplified format, and small packages have abbreviated formats, all defined in 21 CFR 101.9.
How do added sugars and rounding work?
Added sugars are sugars added during processing, table sugar, syrups, honey, concentrated fruit or vegetable juice beyond what you would expect from the whole food, as opposed to sugars naturally present. They are declared on their own indented line in grams and as a percent Daily Value based on a 50-gram daily reference. The compliance challenge is that added sugars are not something a lab can distinguish from natural sugars in a finished product; you calculate them from the formulation, so the recipe records are the proof.
Rounding is prescribed, not free. The regulation sets rounding increments for every nutrient, for example, calories to the nearest 5 below 50 and nearest 10 above; sodium and other nutrients to defined increments; and small amounts declared as “0” only below a threshold. A value can be truthful in the lab and still wrong on the label if it is rounded to the wrong increment.
| Element | Rule of thumb | Where it is set |
|---|---|---|
| Serving size | Derived from the RACC for the food category | 21 CFR 101.12 |
| Calories | Largest, boldest line; rounded to nearest 5 or 10 | 21 CFR 101.9(c) |
| Added sugars | Grams + %DV; calculated from formulation | 21 CFR 101.9(c)(6) |
| Vitamin D, potassium | Now mandatory, actual amount + %DV | 21 CFR 101.9(c)(8) |
| Rounding | Fixed increments per nutrient | 21 CFR 101.9(c) |
Who is exempt from Nutrition Facts labeling?
Small businesses can qualify for exemptions, but the thresholds are specific. The low-volume exemption under 21 CFR 101.9(j)(18) applies when the company employs fewer than 100 full-time-equivalent employees and sells fewer than 100,000 units of that product in the U.S. over 12 months, and requires filing a notice with the FDA. A separate small-business exemption covers firms with low total food sales, for example, annual gross sales not more than $500,000, or sales of food to consumers not more than $50,000. Exemptions are lost if the product carries a nutrient claim (like “low fat”) or nutrition information. Check your eligibility against FDA's small-business exemption guidance before relying on one.
How do you build and verify a compliant label?
Building a label is a repeatable sequence, and the discipline is in keeping the calculation records:
- Classify the product and find its RACC in 21 CFR 101.12.
- Set serving size and servings per container applying the single-serving and dual-column rules.
- Build the nutrient profile from a lab analysis, a validated database, or both, tied to the finished recipe.
- Calculate added sugars from the formulation, since no test separates them from natural sugars.
- Apply the prescribed rounding increment to every value.
- Lay out the panel in the required format, type sizes, and nutrient order.
- Reconcile the ingredient statement and allergen declaration so the whole label agrees with itself, then re-verify whenever the formula changes.
The rules and sources worth pinning
Labeling rules are precise and occasionally updated, so cite the regulation, not a template:
- The panel's content, format, and rounding live in 21 CFR 101.9; serving-size reference amounts in 21 CFR 101.12.
- FDA's Nutrition Facts Label hub collects the industry guidance and examples.
- Updated-format compliance dates were January 1, 2020 ($10M+ in food sales) and January 1, 2021 (under $10M), both now in effect.
- The low-volume small-business exemption threshold is fewer than 100 FTE employees and fewer than 100,000 units per 21 CFR 101.9(j)(18).
The through-line: a Nutrition Facts panel is a calculation with a paper trail, and the panel is only as defensible as the formulation and analysis records behind it. A formula change that quietly moves added sugars or sodium can put a compliant-looking label out of spec. Plants that keep recipe and label records on paper struggle to prove which label version matched which production lot; plants that capture that link at the point of work can answer it in a query. That is the digitize-the-paper move Harmony runs across production and quality records (see how CLS did it), and it works alongside the label and change control your food safety plan already requires. A non-GMO or bioengineered status you claim on-pack rides on the same records, see non-GMO certification.