Everything you need to know about 21 CFR Part 101 — from Nutrition Facts formatting to health claim rules, with exact citations and actionable checklists.
Bottom line: FDA food labels must include 5 principal display panel elements (statement of identity, net quantity, Nutrition Facts, ingredient list, allergen declaration) plus manufacturer information. Non-compliance can result in warning letters, product detention, seizures, and criminal prosecution. The FDA issues approximately 300 food labeling warning letters annually.
Under 21 CFR 101, every packaged food sold in the United States must display five elements on the Principal Display Panel (PDP) or Information Panel. Missing any one of these is considered misbranding under the Federal Food, Drug, and Cosmetic Act.
The common or usual name of the food. Must be prominent and on the PDP. [21 CFR 101.3]
Must be on the lower 30% of the PDP in lines generally parallel to the base. Use avoirdupois weight (oz, lb) AND metric (g, kg) or US measure AND metric for fluid. [21 CFR 101.105]
Must include calories, total fat, saturated fat, sodium, total carbohydrate, dietary fiber, total sugars, added sugars, protein, vitamin D, calcium, iron, and potassium. [21 CFR 101.9]
Must list all ingredients in descending order of predominance by weight. Must be on the same label panel as the manufacturer name. [21 CFR 101.4]
The 9 major allergens must be declared (FALCPA + FASTER Act). Name and address of manufacturer, packer, or distributor must appear on the label. [21 CFR 101.5, 21 USC 343(w)]
The FDA updated Nutrition Facts requirements in 2016. All manufacturers must use the new format. Key changes include added sugars, updated Daily Values, and mandatory vitamin D, calcium, iron, and potassium.
The Food Allergen Labeling and Consumer Protection Act (FALCPA) of 2004 required 8 allergens. The FASTER Act of 2021 added sesame as the 9th, effective January 1, 2023.
Describe the role of a nutrient or ingredient intended to affect normal structure or function. No pre-approval required, but must include the disclaimer and notify FDA within 30 days. [21 CFR 101.93]
Required disclaimer: "This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease."
Based on significant scientific agreement (SSA). Must use exact authorized language. [21 CFR 101.72-101.83]
Supported by emerging evidence but not SSA. Must include qualifying language. Examples include omega-3 fatty acids and coronary heart disease, and walnuts and coronary heart disease. [FDA Guidance for Industry]
The #1 cause of food recalls. Often happens when ingredient suppliers change formulations or when sub-ingredients contain allergens not declared on the final label.
21 USC 343(w)Using outdated formats, incorrect Daily Values, wrong serving sizes, or miscalculated nutrients. The FDA checks these during facility inspections.
21 CFR 101.9Making disease claims (e.g., 'prevents cancer') on conventional foods, or structure/function claims without the required disclaimer.
21 CFR 101.93Using terms like 'juice' when the product is mostly water and sugar, or 'natural' on highly processed products.
21 CFR 101.3, 21 CFR 101.18(a)Net quantity not in the lower 30% of the PDP, missing metric equivalent, or misleading slack fill.
21 CFR 101.105FDA warning letters for food labeling typically fall into three categories: allergen violations, nutrition panel errors, and unauthorized claims. Here's what inspectors look for.
One warning letter costs $50K–$500K. A $29 check today prevents a recall tomorrow.
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