FDA 483 Citations for Dietary Supplement Product Specifications Under 21 CFR 111.70(e) and 111.75(c)

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"You did not establish product specifications for [identity] [purity] [strength] [composition] [limits on contamination]." FDA investigators cited 21 CFR 111.70(e) with that wording 188 times on system-generated Form FDA 483s in fiscal year 2025. It was the most cited observation under the dietary supplement current good manufacturing practice rule, Part 111, which drew nearly 2,000 citations in all.

A closely related observation followed: "You did not verify that your finished batch of dietary supplement meets product specifications for [identity] [purity] [strength] [composition] [limits on contamination ...]," 111.75(c), 37 times.

Specifications are the foundation of Part 111. Without them, a firm has no defined standard for what its product is, so it cannot show that any batch is what the label says.

What the citations mean

Examples written after "Specifically" usually describe:

No written specifications for finished products at all
Specifications that cover only appearance or weight, not identity, strength or contamination
Strength specifications that do not match the label claim for each dietary ingredient
No limits for microbial contamination, heavy metals or other relevant contaminants
Finished batches released with no testing or examination against specifications
Testing done, but only by the contract laboratory's default panel, which does not match the firm's specifications
No documented basis for testing only some specifications on the finished batch

What Part 111 requires

Specifications (111.70(e)). For each dietary supplement that you manufacture, you must establish product specifications for the identity, purity, strength and composition of the finished batch, and for limits on those types of contamination that may adulterate, or that may lead to adulteration of, the finished batch.

Section 111.70 also requires specifications for components (111.70(b)), in-process steps where needed (111.70(c)), labels and packaging (111.70(d)), product received for packaging or labeling (111.70(f)) and packaged and labeled product (111.70(g)).

Verifying the finished batch (111.75(c)). For a subset of finished batches identified through a sound statistical sampling plan, or for every finished batch, you must verify that the batch meets product specifications. To do that, you must:

Select one or more established specifications for identity, purity, strength, composition and limits on contamination that, if tested or examined on the finished batches, would verify that your production and process control system is producing product that meets all specifications, or only those not exempted under 111.75(d)
Document the basis for determining that compliance with the selected specifications, together with component and in-process testing, will ensure that the finished batch meets all product specifications
Conduct appropriate tests or examinations to determine compliance with the selected specifications

When specifications are not met (111.77 and 111.113). Quality control personnel must reject the batch unless they approve a treatment, in-process adjustment or reprocessing that will ensure the batch meets specifications, with the reasons documented.

Under 111.75(h), tests and examinations must use appropriate, scientifically valid methods.

How to respond to the 483

Part 111 does not set a deadline for responding, but most firms respond in writing within 15 business days of the close of the inspection, so FDA has the response before it decides on further action, such as a warning letter.

Write specifications for every product

For each finished product, write specifications for identity, purity, strength and composition, and limits on contamination. Strength specifications should cover each dietary ingredient declared in the Supplement Facts panel, with ranges consistent with the label claim through the shelf life you claim. Contamination limits typically address microbial counts and pathogens, heavy metals and, where relevant, pesticides, solvents or other contaminants. Base limits on regulatory requirements, recognized references such as USP monographs, and your own risk assessment.

Decide what to test on the finished batch

Document which specifications you test on finished batches and why, with the link to component and in-process testing. Specifications you do not test on the finished batch must be covered by that documented rationale.

Assess product already distributed

For batches released without specifications or testing, test retained reserve samples where possible. Decide whether any product in distribution may not meet its label claim or may be contaminated, and whether a recall is needed.

Fix the system

A specification procedure and format
Quality control review and approval of every specification
Finished batch release only after test results are reviewed against specifications
Requirements that contract laboratories test to your specifications with scientifically valid methods
Out-of-specification handling through quality control

What a compliant specification program contains

Specifications for components, in-process steps, labels and packaging, and finished product
Basis for each limit
Finished batch testing plan and its documented rationale
Scientifically valid test methods
Quality control approval of specifications and results
Out-of-specification investigation and disposition
Records

Common mistakes in specification responses

Writing specifications that only repeat the label claim, with no range or method
Leaving out contamination limits
Testing every batch for everything without a plan, which is costly and hard to sustain, or testing nothing with a weak rationale
Relying on a laboratory's standard panel instead of your own specifications
Fixing specifications without assessing product already on the market

Example: how one response section might read

This illustrates structure only; your response must describe your own products and facts.

Observation 1: You did not establish product specifications for identity, purity, strength, composition and limits on contamination. Specifically, no specifications exist for the magnesium glycinate capsules.

Response:

Correction: Specifications were approved by quality control on a stated date, covering identity, strength for magnesium per capsule, composition, microbial limits and heavy metal limits, with methods for each.
Finished batch testing: The documented testing plan selects identity, magnesium content and microbial limits for every finished batch, supported by component identity testing and in-process weight checks.
Product assessment: Reserve samples from the 14 batches in distribution were tested, and all met the new specifications.
Extended review: Specifications for the remaining 22 products will be approved by a stated date.

Frequently asked questions

Do we have to test every finished batch?

Not necessarily. You may verify a subset of batches identified through a sound statistical sampling plan, or every batch, under 111.75(c). Either way, you must document why your selected tests, together with component and in-process controls, ensure all specifications are met.

Can we rely on our contract manufacturer's specifications?

If you are the firm that manufactures, packages, labels or holds the product, Part 111 obligations apply to you. Brand owners who contract out manufacturing are expected to make sure the product meets specifications and should review and approve them.

What contaminants need limits?

Those that may adulterate or lead to adulteration of your product. Microbial limits and heavy metals are common, and others depend on the ingredients and process.

How A.P. Lyon documents help

A.P. Lyon's Dietary Supplement cGMP Quality System (21 CFR 111) includes procedures and forms for specifications, finished batch verification, quality control and laboratory operations. For firms that use contract manufacturers, the Supplement Brand Owner Compliance Pack covers specification approval and oversight. See all dietary supplement documents.

Documents are editable Word and Excel files and must be adapted to your products and operations. Specifications and limits must be set by qualified people based on your own products.

Next steps

Write and approve specifications for every product
Document your finished batch testing plan and its basis
Test reserve samples and assess product in distribution
Respond in writing within 15 business days with dates for each action

To compare the complete system with the brand owner pack, see all dietary supplement documents.

Not sure where your quality system stands? Take the free QMS gap check: about 20 questions, an instant report of your gaps by clause, and the procedures that close each one.