What Does 21 CFR 101.36 Require on a Supplement Facts Label?

21 CFR 101.36 requires dietary supplements offered for sale in the United States to bear a Supplement Facts panel that meets the regulation's content and format requirements, including serving size, servings per container, the (b)(2) nutrient declarations when present, amounts per serving, and percent Daily Value. There's no way around it unless a specific exemption applies, and those exemptions are narrower than most brands assume.

The regulation spells out exactly what belongs on that panel and how it has to look:

• The Supplement Facts heading, set apart from other label text
• Serving Size and Servings Per Container
• Every required (b)(2) dietary ingredient present in the product, listed in the mandated order
• Amount Per Serving for each declared ingredient
• Percent Daily Value (%DV) where an established reference value exists
• Specific type-size, spacing, and layout rules governing how all of it gets printed

Manufacturers carry full legal responsibility for the accuracy of everything printed on that panel. The FDA's Dietary Supplement Labeling Guide walks through the interpretation, and the regulation itself, 21 CFR § 101.36, is the controlling text. If your label doesn't match what's in the bottle, the FDA doesn't care that your co-packer made the mistake. It's your name on the label.

Key Takeaways

A compliant Supplement Facts panel under §101.36 requires the correct heading, serving size, nutrient order, accurate %DV math, and formatting that matches §101.9's type-size and layout rules, all backed by documentation that ties declared amounts to real lab data.

Table of Contents

• What Are the Required Elements of a Supplement Facts Panel?
• How Do You Determine Serving Size and Servings Per Container?
• Which Nutrients Must Appear and in What Order?
• How Do You Calculate and Present Percent Daily Value?
• What Are the Type-Size and Layout Rules for Supplement Facts?
• When Can a Dietary Supplement Skip or Modify Supplement Facts?
• How Should You Handle Recordkeeping and Audit Readiness?
• Where Can You Find the Official §101.36 Text and Guidance?
• A Compliance Perspective on Operationalizing §101.36
• How FormlyPro Helps Manufacturers Manage Supplement Facts Compliance
• Sources

What Are the Required Elements of a Supplement Facts Panel?

The words "Supplement Facts" have to appear as a standalone heading, set in bold, larger type than the information below it, and enclosed by a box or hairline border in most layouts. This isn't a stylistic suggestion. Placement and hierarchy are dictated under §101.36(e), and inspectors check this first because it's the fastest way to spot a sloppy label.

Below the heading, the panel follows a fixed structural order:

1. Serving Size and Servings Per Container appear immediately under the heading, before any nutrient data.
2. A heavy horizontal bar separates the heading area from the nutrient declarations.
3. Column headings for "Amount Per Serving" and "% Daily Value" sit directly above the nutrient list.
4. Nutrients follow in the order specified by §101.9(c), with the (b)(2) dietary ingredients listed afterward.
5. A footnote area at the bottom carries required disclaimers, like the "Daily Value not established" statement for ingredients lacking an RDI or DRV.

The phrase "Amount Per Serving" isn't the only acceptable heading. The regulation allows alternate phrasing when a product's format makes more sense described differently. "Each tablet contains" or "Each packet supplies" are common substitutions for single-unit products like effervescent tablets or stick packs, as long as the substitute phrase is at least as clear as the standard language.

Grouping matters too. (b)(2) dietary ingredients (vitamins, minerals, and other nutrients with established Daily Values) get listed first, in the order set by §101.9(c). (b)(3) ingredients (botanicals, amino acids, and other substances without an established DV) follow in a separate grouping, typically below a second heavy bar, with their part of the plant identified when relevant (leaf, root, extract ratio, and so on).

Pro Tip: Build your label template with the heavy bars and column headings locked in place before you ever start dropping in ingredient data. Most rework happens when a designer tries to retrofit formatting around content instead of the other way around.

How Do You Determine Serving Size and Servings Per Container?

Serving size isn't a marketing decision. It's a regulatory calculation tied to the product's dosage form, and §101.9(b) alongside the Reference Amounts Customarily Consumed table in §101.12(b) governs how you pick the unit.

For dietary supplements, the serving size is usually the number of tablets, capsules, softgels, packets, or teaspoonfuls that a manufacturer recommends taking per intake occasion, expressed in a household unit a consumer immediately understands. Two capsules. One scoop. One packet. The label states both the unit count and, where relevant, a metric equivalent.

Practical pitfalls show up constantly during label review:

• Mismatched net-quantity statements. If the front-of-pack net weight doesn't divide cleanly by the serving size times the servings per container claimed, that's an immediate red flag for reviewers and regulators alike.
• Ambiguous serving language. "Take as needed" or "1 to 3 capsules daily" creates a moving target for %DV calculations. The panel needs a single defined serving, even if the directions for use allow a range.
• Incorrect per-day math. Products marketed with a "per day" column (common for multi-capsule regimens split across morning and evening doses) frequently get the arithmetic wrong when the total per-day amount doesn't equal the sum of the individual serving declarations.

A "per unit" or "per day" column is permitted when a single container serving is split into multiple physical units taken at different times, but the panel must clearly label which column represents which measurement. Guessing at this level of precision is how audits go sideways.

Which Nutrients Must Appear and in What Order?

The (b)(2) nutrients are the backbone of the panel, and they follow a strict declaration order once present in the formula above a "zero" threshold. When a nutrient qualifies for declaration, it has to appear in this sequence: calories, total fat, saturated fat, trans fat, cholesterol, sodium, total carbohydrate, dietary fiber, total sugars, added sugars, protein, vitamin D, calcium, iron, and potassium.

That ordering isn't arbitrary. It mirrors §101.9(c), the same rule that governs conventional food Nutrition Facts panels, with a handful of exceptions carved out for supplements under §101.36. Vitamin D, calcium, iron, and potassium get mandatory placement on supplement labels regardless of amount, which differs from the conventional food rule where some of these only trigger declaration above certain thresholds.

A few naming conventions trip people up constantly:

• Declare the nutrient, not the compound form used to deliver it. Calcium goes on the label as "Calcium," never as "Calcium carbonate," even though calcium carbonate is the actual raw material in the formula.
• The source ingredient name belongs in the (b)(3) section or the "Other Ingredients" statement below the panel, not mixed into the (b)(2) nutrient list.
• Zero-level declarations still require specific handling. A nutrient present at a level low enough to round to zero under §101.9(c)'s rounding rules must still be labeled "0" rather than omitted, when that nutrient is one of the mandatory (b)(2) items.

The 2021 Small Entity Compliance Guide covering the Nutrition and Supplement Facts label overhaul shifted the ordering and formatting for added sugars specifically, aligning supplement labels more closely with conventional food labels. If your label template predates that update, it's worth a formal review against the current sequence rather than assuming your existing artwork is still compliant.

How Do You Calculate and Present Percent Daily Value?

Every amount declared on a Supplement Facts panel has to represent the actual weight of that nutrient per serving, expressed in the units and increments set by §101.9(c). Rounding isn't optional, and it isn't left to a designer's judgment call. It follows a fixed schedule based on the nutrient and its amount.

Here's the practical sequence for getting %DV right:

1. Determine the declared amount per serving using your validated analytical data, not a theoretical formulation number pulled from a spec sheet.
2. Apply the correct rounding increment from §101.9(c) for that specific nutrient (vitamin C rounds differently than calcium, for instance).
3. Divide the declared amount by the nutrient's Daily Value (the RDI or DRV set by FDA) to get the raw percentage.
4. Round the resulting percentage to the nearest whole number. Amounts under 1% but above zero get declared as "Less than 1%" rather than a fractional number.
5. Omit %DV entirely for nutrients without an established Daily Value, replacing it with a footnote symbol like a dagger.

A couple of special cases catch label reviewers off guard. Protein's %DV can be omitted for products intended for infants, in line with the exemptions built into §101.9. And vitamin D, which the current rules require in micrograms, is permitted to show the equivalent International Units in parentheses right after the mcg figure, since a huge share of the supplement-buying public still recognizes IU better than mcg.

What Are the Type-Size and Layout Rules for Supplement Facts?

Type size isn't negotiable once you're past the default rules, and this is where a surprising number of otherwise well-built labels get rejected during package proofing. The baseline standard requires body text no smaller than 8-point type, with 6-point type permitted for column headings and footnotes, derived from the formatting requirements built into §101.36 and cross-referenced against §101.9.

Layout has to follow the same rigid pattern across every product in your line:

• The heavy bar separating the heading block from the nutrient declarations must run the full width of the panel.
• Column headings ("Amount Per Serving," "% Daily Value") sit directly above their respective data columns, never floating or repositioned for design flair.
• A "per day" column, when used, needs its own clearly labeled header distinct from the standard per-serving column.
• All information stays within a single, uninterrupted panel; you can't split Supplement Facts across two separate label panels on the same package.

Small packages get some relief here. When the available label space genuinely can't accommodate standard type sizes, alternative formatting is allowed, including a tabular or linear presentation with reduced spacing, but the reduction has a floor. You still can't shrink below what a person can reasonably read without a magnifying glass, and FDA reviewers treat "the package was small" as an explanation, not an excuse for skipping required elements entirely.

Pro Tip: *Run every new label design through a printed proof at actual size before final approval. Do not rely solely on a digital mockup.

When Can a Dietary Supplement Skip or Modify Supplement Facts?

A handful of exemptions exist, and they're far narrower than the compliance folklore that circulates among smaller brands. §101.36 references the broader exemption structure in §101.9, which covers situations like small retailers selling directly to consumers under specific volume thresholds, and certain products intended for use by infants or young children where different declaration rules apply.

Relying on any exemption without documentation is a bad bet during an inspection. Here's how to validate one before you act on it:

1. Identify the exact exemption clause you believe applies and pull the specific citation, not a paraphrase from a forum or a competitor's label.
2. Document the qualifying conditions in writing, tying your product's actual sales channel, package size, or intended consumer group to the exemption's stated criteria.
3. Keep that documentation with your label file, so if an FDA inspector asks why a panel is modified or absent, you can produce the reasoning on the spot rather than reconstructing it after the fact.

Three checks before you remove or alter a Supplement Facts panel: confirm the exemption's exact wording against your product's real sales model, confirm nothing in your marketing claims contradicts the conditions that justify the exemption, and get a second set of eyes, ideally someone outside the original label design process, to review the justification before print.

How Should You Handle Recordkeeping and Audit Readiness?

Getting the panel right on day one means nothing if you can't prove it stayed right six months and four production runs later. FDA's inspection approach for dietary supplements frequently involves composite sampling, where inspectors pull product from store shelves or manufacturing lots and send it to a lab for comparison against your declared label values. If your paperwork can't connect that specific lot back to a specific formulation version and a specific analytical result, you're exposed regardless of how accurate your original label was.

Build your recordkeeping around a few non-negotiables:

• Versioned formulation records. Every time a formula changes, even a minor excipient swap, the old version gets archived, not overwritten, so you can always answer "what was in lot X when it shipped."
• Supplier Certificates of Analysis (COAs) tied to the specific raw material lot used in each production run, not a generic COA pulled from a supplier's catalog page.
• In-house or third-party analytical test reports that show actual measured nutrient content per serving, cross-referenced against what's printed on the label.
• In-process control records documenting batch-level sampling during manufacturing, kept for a period that covers your product's full shelf life plus a reasonable buffer beyond expiration.

A batch-specific COA and lab test record, linked to the exact SKU and label version, is the single piece of documentation most likely to determine whether an FDA inspection ends quietly or escalates. Manufacturers who can produce that chain in minutes come out of routine inspections in far better shape than those scrambling through email threads and spreadsheet versions to reconstruct it.

Pro Tip: Treat every label revision as a new version number, not an edit to the old one. When an inspector asks about a product you shipped fourteen months ago, "which version was that" needs a five-second answer, not a week of archive digging.

Manual tracking across spreadsheets and shared drives is where most of this breaks down in practice, and it's exactly the gap that centralized formulation and compliance platforms exist to close. A system that keeps formula versions, ingredient metadata, and COA attachments linked to a single product record removes the guesswork from reconstructing that chain later. For a deeper look at building that documentation discipline into your product workflow, see this regulatory compliance checklist, and for reproducibility practices worth borrowing from adjacent research fields, this piece on documenting experiments for reproducibility covers similar ground from a lab-notebook angle.

Where Can You Find the Official §101.36 Text and Guidance?

Working from a secondhand summary of the regulation is how small errors compound into label failures. Go to the primary sources directly, and keep them bookmarked for every label review cycle:

• The eCFR mirror of §101.36 gives you the current, continuously updated text for quick reference during day-to-day label work.
• The FDA Dietary Supplement Labeling Guide, Chapter IV provides the interpretive detail and worked examples the bare regulatory text doesn't include.
• The govinfo PDF of the 2024 CFR edition is the authoritative printed-version copy worth keeping on file for internal audits and legal review.

Most enforcement actions trace back to the same handful of triggers: missing or misordered (b)(2) nutrients, type-size violations caught during retail shelf surveys, or a lab result that doesn't match a declared amount. Prioritize remediation against whichever of those three shows up first in your own internal review, and check the Federal Register periodically for amendments that might shift ordering or declaration rules again.

A Compliance Perspective on Operationalizing §101.36

Most label failures I've seen traced back through compliance discussions aren't caused by anyone misreading the regulation. They're caused by the regulation living in one person's head while the actual production data lives somewhere else entirely, scattered across supplier emails, old spec sheets, and a designer's most recent InDesign file. §101.36 is precise enough to follow exactly, but precision on paper doesn't help if nobody can trace a declared amount back to a lab result six months after the fact.

The recurring bottleneck is almost always ingredient metadata. A raw material gets swapped, a supplier changes their COA format, or a formulation gets tweaked to hit a cost target, and the label team finds out weeks later, if at all. Centralized, versioned documentation closes that gap, not because it makes the regulation easier to understand, but because it makes the connection between formula and label impossible to lose track of. Platforms built specifically around formula-to-label traceability, including FormlyPro's own workflow, exist because this exact failure mode is common enough to justify purpose-built tooling rather than another shared spreadsheet.

— Ben

How FormlyPro Helps Manufacturers Manage Supplement Facts Compliance

Formlypro gives label compliance teams one place to keep formula versions, ingredient metadata, and COA attachments tied to the exact SKU and label revision they belong to, instead of chasing that chain across email and spreadsheets when an inspector asks for it.

The platform's compliance guidance layer flags the kind of ordering, type-size, and declaration issues covered above before artwork goes to print, and its label export tools generate Supplement Facts panels built to the current §101.9(c) sequence and formatting rules. The packaging module adds an AI mockup designer, so a compliance-reviewed panel and the finished package design stay in sync instead of getting approved separately and reconciled later. For teams managing more than a couple of SKUs, that traceability is the difference between a five-minute answer during an audit and a week of archive digging. If your current label workflow is still living across disconnected files, FormlyPro is worth a look before your next label refresh or SKU launch.

Sources

Keep these bookmarked for every label review and audit prep cycle:

• 21 CFR § 101.36 - Nutrition labeling of dietary supplements.
• Dietary Supplement Labeling Guide: Chapter IV. Nutrition labeling
• § 101.36 21 CFR Ch. I (4–1–24 Edition)

Cite the CFR by section number and edition year when documenting compliance decisions, and check the Federal Register periodically since amendments to nutrition labeling rules do get issued without much advance notice to smaller brands.

This article is general information, not a substitute for advice from a qualified lawyer. Consult a qualified legal professional about your own circumstances before acting on anything here.

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