Supplement Stability Testing: Support the Date on the Label
A best-by date is a claim. Part 111 does not require one, but if it is on the label you should be able to show the data behind it.
In Short
- No shelf-life date is required, but retention follows one if used.
- ICH Q1 is drug guidance; many supplement firms adapt it.
- Tie every overage to stability data.
The Dietary Supplement Operations Guide
What the label says. What the batch proves.
- The rules and who decides
- Specification to finished batch
- Test, review, investigate
- Labels, samples and recall
Plus Evidence map and four worksheets.
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The Dietary Supplement Operations Guide
What the label says. What the batch proves.
ICH Q1A(R2) is a drug guideline, and FDA issued a consolidated draft revision (ICH Q1) for comment in June 2025. Dietary supplements are not bound by it. Part 111, the supplement CGMP rule, does not require a shelf-life date, but it refers to shelf-life dating where a firm uses it, for example in record and reserve-sample retention. Many supplement makers adapt ICH Q1 study design to support the date they choose. Checked against the eCFR and FDA's ICH Q1 guidance page on 2 Oct 2026.
What Part 111 says
Part 111 does not require an expiration or best-by date. Where shelf-life dating is used, records and reserve samples are kept for 1 year past the shelf-life date; otherwise for 2 years from distribution of the last batch.
More on what Part 111 says
A date on the label is a claim, so it should be backed by data you can show.
Borrowing from ICH Q1
ICH Q1A(R2) sets out long-term, intermediate and accelerated storage conditions, test frequency and how to evaluate results for drugs. Supplement makers often use the same structure, choosing conditions for the markets they sell in.
ICH Q1A(R2) general storage conditions
| Study | Condition | Minimum period at submission |
|---|---|---|
| Long term | 25 °C/60% RH or 30 °C/65% RH | 12 months |
| Intermediate | 30 °C/65% RH | 6 months |
| Accelerated | 40 °C/75% RH | 6 months |
- Long term
- Condition
- 25 °C/60% RH or 30 °C/65% RH
- Minimum period at submission
- 12 months
- Intermediate
- Condition
- 30 °C/65% RH
- Minimum period at submission
- 6 months
- Accelerated
- Condition
- 40 °C/75% RH
- Minimum period at submission
- 6 months
More on borrowing from ICH Q1
FDA's June 2025 ICH Q1 draft consolidates the series and was still a draft when checked.
Choosing what to test
Test the components behind label claims, such as vitamin or probiotic counts, and attributes that change with time, such as moisture, appearance and microbial quality. Unstable ingredients often get an overage at manufacture; tie each overage to stability data, not to habit.
Reading the Results
Plot each attribute over time against its specification. Accelerated data can support a provisional date while long-term data accumulates.
Worked Example: a Vitamin K2 Capsule
- Month 0Lot SK-301 assays 118 µg against a 100 µg claim (overage)QC
- Month 6Accelerated: 101 µg. Long term: 113 µgQC
- Month 12Long term: 108 µg; trend projected to stay above claim at 24 monthsStability lead
- Month 12Qualified reviewer approves a provisional 24-month date; study continuesQA
More on reading the Results
Trends near the limit, or a result outside it, are reviewed by qualified people, who decide whether to shorten the date or investigate.
Records and who decides
Keep the protocol, storage conditions, pull dates, results and the conclusion. V5 manages stability studies in the laboratory workspace, with sample plans, results and SPC views.
More on records and who decides
Qualified people interpret the data and approve the shelf-life date.
Questions
Do supplements legally need a shelf-life date?
No. Part 111 does not require one. If you use shelf-life dating, Part 111 ties record and reserve-sample retention to that date, and the date is a claim you should be able to support.
Does ICH Q1A apply to supplements?
Not directly; it is drug guidance. Many supplement firms adapt its study design. FDA issued a consolidated ICH Q1 revision as draft guidance in June 2025; it remained a draft when this guide was checked.
Can accelerated data alone set a shelf life?
It can support a provisional date while long-term data is collected. Qualified people decide how much weight to give it and confirm the date as long-term results come in.
Does V5 decide our shelf life?
No. V5 manages stability studies, sample plans, results and trend views. Statistical interpretation and the shelf-life decision require qualified review.
Practical orientation, not legal advice. Rules differ by jurisdiction; your quality and compliance team decides what applies.
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