# Nutrient



**A Nutrient is a substance in food that provides nourishment for growth, energy, and cell maintenance. BetterMenu tracks macronutrients (carbohydrates, proteins, fats — measured in grams) and micronutrients (vitamins, minerals — measured in milligrams or micrograms) using FDA Recommended Daily Intake references.**

What is a nutrient and why does it matter? [#what-is-a-nutrient-and-why-does-it-matter]

A nutrient is any chemical compound in food that the human body uses for energy production, structural growth, enzymatic function, or cellular repair. Nutrients are absorbed through the digestive tract and transported to tissues where metabolic processes convert them into functional molecules. No single food provides all required nutrients in adequate quantities — dietary variety is necessary to satisfy the body's full spectrum of nutritional needs. The scientific study of how nutrients affect health and disease informs both clinical dietary guidance and regulatory labeling requirements. For food manufacturers, restaurant operators, and clinical dietitians, accurate nutrient data is the foundation of compliance, menu development, and patient counseling.

What are macronutrients and how are they measured on food labels? [#what-are-macronutrients-and-how-are-they-measured-on-food-labels]

Macronutrients are nutrients required in large quantities that supply the body with calories (energy). The three primary macronutrients are fat, carbohydrate, and protein.

**Fat** provides 9 kilocalories per gram. Dietary fat encompasses total fat, saturated fat, trans fat, monounsaturated fat, and polyunsaturated fat. Saturated fat and trans fat are of particular public health concern because of their association with cardiovascular disease risk.

**Carbohydrate** provides 4 kilocalories per gram. Total carbohydrate includes dietary fiber, total sugars, and added sugars. Dietary fiber contributes to digestive health, while added sugars — those incorporated during processing rather than occurring naturally — are an independent public health metric requiring separate disclosure under current US labeling rules.

**Protein** provides 4 kilocalories per gram. Proteins are composed of amino acids, nine of which are classified as essential because the human body cannot synthesize them endogenously. Protein quality and quantity are therefore distinct nutritional considerations.

All three macronutrients are measured and declared in **grams (g)** on food labels.

What are micronutrients and which ones are tracked in food labeling? [#what-are-micronutrients-and-which-ones-are-tracked-in-food-labeling]

Micronutrients are nutrients required in small quantities that regulate metabolic processes, support immune function, and maintain structural tissues such as bone. Unlike macronutrients, micronutrients do not supply calories.

**Vitamins** are organic compounds the body cannot synthesize in sufficient quantities. They are divided into fat-soluble vitamins (A, D, E, K) — which are stored in adipose tissue and the liver — and water-soluble vitamins (C and the B-complex group) — which are not stored and require regular dietary replenishment. Vitamins are measured in milligrams (mg) or micrograms (mcg/µg). Vitamin D is also historically expressed in International Units (IU), though the updated US Nutrition Facts label transitioned to micrograms as the primary declared unit.

**Minerals** are inorganic elements essential for nerve conduction, muscle contraction, fluid balance, and bone mineralization. Key minerals tracked in food labeling include calcium, iron, potassium, and sodium. Minerals are measured in milligrams (mg) or, in the case of certain trace elements such as chromium and selenium, micrograms (mcg).

Which nutrients fall outside the standard macro/micro classification? [#which-nutrients-fall-outside-the-standard-macromicro-classification]

Certain nutritionally significant compounds resist clean classification as either macronutrients or micronutrients. Water is the body's primary solvent and transport medium, required in quantities measured in liters — far exceeding any vitamin or mineral. Electrolytes such as sodium, potassium, and chloride serve both mineral and fluid-regulation roles simultaneously. Cholesterol is a lipid compound tracked independently on US Nutrition Facts labels despite not supplying calories. These compounds are tracked by BetterMenu using the same structured nutrient data model as macronutrients and micronutrients.

What units are used to measure nutrients on food labels? [#what-units-are-used-to-measure-nutrients-on-food-labels]

The unit of measure for a nutrient is determined by the quantity at which it exerts physiological effect and the precision required for meaningful labeling.

| Unit               | Abbreviation | Typical Nutrients                                          |
| ------------------ | ------------ | ---------------------------------------------------------- |
| Gram               | g            | Fat, carbohydrate, protein, dietary fiber, sugars          |
| Milligram          | mg           | Sodium, calcium, iron, potassium, vitamin C, niacin        |
| Microgram          | mcg / µg     | Vitamin D, vitamin B12, folate, selenium, iodine           |
| International Unit | IU           | Vitamin D (legacy), Vitamin A (legacy), Vitamin E (legacy) |
| Kilocalorie        | kcal         | Calories (energy)                                          |

The FDA updated the Nutrition Facts label effective January 1, 2020 (large manufacturers) and January 1, 2021 (small manufacturers) to require that vitamin D and potassium be declared in mcg and mg respectively, replacing IU declarations for vitamin D and eliminating mandatory declarations for vitamins A and C (which became voluntary). This shift reflects updated public health priorities. [21 CFR 101.9(c)](https://www.ecfr.gov/current/title-21/chapter-I/part-101#p-101.9\(c\)) governs which nutrients must be declared and in which units.

Which nutrients are mandatory vs. voluntary on the US Nutrition Facts label? [#which-nutrients-are-mandatory-vs-voluntary-on-the-us-nutrition-facts-label]

Under [21 CFR 101.9](https://www.ecfr.gov/current/title-21/chapter-I/part-101/section-101.9), the FDA divides nutrients into mandatory and voluntary disclosure categories. Mandatory nutrients must appear on every compliant Nutrition Facts label for conventional foods sold in the United States. Voluntary nutrients may be declared at the manufacturer's option, but once declared, must comply with the same format and accuracy requirements as mandatory nutrients.

**Mandatory nutrients** (as of the 2016-revised label requirements):

* Calories
* Total Fat (g)
* Saturated Fat (g)
* Trans Fat (g)
* Cholesterol (mg)
* Sodium (mg)
* Total Carbohydrate (g)
* Dietary Fiber (g)
* Total Sugars (g)
* Added Sugars (g)
* Protein (g)
* Vitamin D (mcg)
* Calcium (mg)
* Iron (mg)
* Potassium (mg)

**Voluntary nutrients** include, but are not limited to: monounsaturated fat, polyunsaturated fat, soluble fiber, insoluble fiber, sugar alcohols, vitamins A, C, E, K, thiamin, riboflavin, niacin, vitamin B6, folate, vitamin B12, biotin, pantothenic acid, phosphorus, iodine, magnesium, zinc, selenium, copper, manganese, chromium, and molybdenum. Voluntary nutrients that are added to a food or are the subject of a nutrient content claim must be declared. See [21 CFR 101.9(c)(8)](https://www.ecfr.gov/current/title-21/chapter-I/part-101#p-101.9\(c\)\(8\)) for the complete voluntary nutrient list.

```mermaid
%%{init: {'theme':'base', 'themeVariables': {'primaryColor':'#ffffff','primaryTextColor':'#000000','primaryBorderColor':'#000000','lineColor':'#000000','secondaryColor':'#f5f5f5','tertiaryColor':'#ffffff'}}}%%
graph TD
    A[Nutrient in Food] --> B{Classification}
    B --> C[Macronutrient]
    B --> D[Micronutrient]
    C --> E[Fat · Carbohydrate · Protein]
    D --> F[Vitamins · Minerals]
    E --> G{Mandatory on\nNutrition Facts?}
    F --> G
    G --> H[Yes → Must declare\nwith amount per serving]
    G --> I[No → Voluntary\ndeclaration]
    H --> J[Express as % Daily Value\nif DV established]
    I --> J
```

How do Daily Values and %DV connect nutrients to recommended intakes? [#how-do-daily-values-and-dv-connect-nutrients-to-recommended-intakes]

How does the FDA define Daily Values and %DV for US food labels? [#how-does-the-fda-define-daily-values-and-dv-for-us-food-labels]

The **Daily Value (DV)** is a single reference figure representing the recommended daily intake of a nutrient for a general adult population consuming a 2,000-calorie diet. The DV is used on US Nutrition Facts labels to calculate the **Percent Daily Value (%DV)**, which enables consumers to assess a food's contribution to daily nutritional needs at a glance.

The FDA derives Daily Values from two source standards, both established through a notice-and-comment rulemaking process and codified in [21 CFR 101.9(c)(9)](https://www.ecfr.gov/current/title-21/chapter-I/part-101#p-101.9\(c\)\(9\)) and [21 CFR 101.9(d)](https://www.ecfr.gov/current/title-21/chapter-I/part-101#p-101.9\(d\)):

* **Reference Daily Intakes (RDIs)**: Applied to vitamins and minerals. RDIs are derived from the Recommended Dietary Allowances (RDAs) and Adequate Intakes (AIs) established by the National Academies of Sciences, Engineering, and Medicine as part of the Dietary Reference Intake (DRI) framework.
* **Daily Reference Values (DRVs)**: Applied to macronutrients (fat, saturated fat, cholesterol, total carbohydrate, dietary fiber, sodium, and protein). DRVs for energy-yielding macronutrients are calculated from the 2,000-calorie reference diet.

The %DV for any nutrient is calculated as:

```
%DV = (Nutrient amount per serving ÷ Daily Value for that nutrient) × 100
```

As a reference threshold established by FDA guidance, 5% DV or less per serving is considered low for a nutrient, while 20% DV or more per serving is considered high. These thresholds apply equally to nutrients one may seek to consume more of (fiber, vitamin D, calcium) and nutrients one may seek to limit (sodium, saturated fat, added sugars). See [FDA — Daily Value on Nutrition and Supplement Facts Labels](https://www.fda.gov/food/nutrition-facts-label/daily-value-nutrition-and-supplement-facts-labels) for the complete table of current Daily Values.

Selected Daily Values for context:

| Nutrient           | Daily Value | Unit |
| ------------------ | ----------- | ---- |
| Total Fat          | 78          | g    |
| Saturated Fat      | 20          | g    |
| Cholesterol        | 300         | mg   |
| Sodium             | 2300        | mg   |
| Total Carbohydrate | 275         | g    |
| Dietary Fiber      | 28          | g    |
| Added Sugars       | 50          | g    |
| Protein            | 50          | g    |
| Vitamin D          | 20          | mcg  |
| Calcium            | 1300        | mg   |
| Iron               | 18          | mg   |
| Potassium          | 4700        | mg   |

These values are current as of the 2016 final rule ([81 FR 33742](https://www.federalregister.gov/documents/2016/05/27/2016-11867/food-labeling-revision-of-the-nutrition-and-supplement-facts-labels)), which became effective for large manufacturers on January 1, 2020.

How do nutrient reference values differ outside the United States? [#how-do-nutrient-reference-values-differ-outside-the-united-states]

Nutrient reference values differ by jurisdiction. The European Union uses **Nutrient Reference Values (NRVs)** established under Regulation (EU) No 1169/2011 on food information to consumers. The United Kingdom, following departure from the EU, references **Reference Intakes (RIs)** published by the Food Standards Agency. Canada uses **Recommended Daily Intakes** under the Food and Drug Regulations. BetterMenu's data model stores jurisdiction-specific reference values separately, enabling compliant %DV or %NRV calculations depending on the target market.

How does BetterMenu represent and expose nutrient data? [#how-does-bettermenu-represent-and-expose-nutrient-data]

BetterMenu's nutrient data model captures each nutrient with its name, amount per serving, unit of measure, and jurisdiction-specific Daily Value or reference intake. This enables the platform to:

* Validate that mandatory nutrients are present and declared for any US-sold product assessed against [21 CFR 101.9](https://www.ecfr.gov/current/title-21/chapter-I/part-101/section-101.9).
* Calculate %DV automatically from the stored Daily Values, flagging nutrients that exceed 20% DV (high) or fall below 5% DV (low) per serving.
* Surface voluntary nutrients that trigger mandatory declaration because they have been added to a food or are referenced in a nutrient content claim.
* Support dietitian workflows by exposing structured nutrient data queryable by nutrient name, unit, amount range, and %DV threshold.
* Support R\&D formulation workflows by providing per-ingredient nutrient contributions, enabling recipe-level nutrient aggregation with full traceability to source ingredient data.

For clinical and menu compliance use cases, the platform applies the same nutrient taxonomy across all food records, ensuring consistent units and reference values regardless of whether data originates from the USDA FoodData Central database, manufacturer-provided nutrition facts, or laboratory analysis.

Where can I find official nutrient labeling references? [#where-can-i-find-official-nutrient-labeling-references]

* [21 CFR 101.9 — Nutrition Labeling of Food (eCFR)](https://www.ecfr.gov/current/title-21/chapter-I/part-101/section-101.9)
* [21 CFR 101.9(c) — Mandatory and Voluntary Nutrient Declarations (eCFR)](https://www.ecfr.gov/current/title-21/chapter-I/part-101#p-101.9\(c\))
* [FDA — Daily Value on Nutrition and Supplement Facts Labels](https://www.fda.gov/food/nutrition-facts-label/daily-value-nutrition-and-supplement-facts-labels)
* [FDA — How to Understand and Use the Nutrition Facts Label](https://www.fda.gov/food/nutrition-facts-label/how-understand-and-use-nutrition-facts-label)
* [Federal Register 81 FR 33742 — Revision of the Nutrition and Supplement Facts Labels (2016 Final Rule)](https://www.federalregister.gov/documents/2016/05/27/2016-11867/food-labeling-revision-of-the-nutrition-and-supplement-facts-labels)
* [NIH — Dietary Reference Intakes](https://ods.od.nih.gov/Health_Information/Dietary_Reference_Intakes.aspx)