T-07

Shelf-life studies

Real-time and accelerated studies that put defensible evidence behind the date printed on your pack.

What it is: Real-time, accelerated and challenge studies
Who it is for: Anyone printing a date they may be asked to justify
Turnaround: Weeks to months, per study plan

WHAT THIS IS

What this is, and why it matters

A shelf-life study establishes how long a product holds its safety and its quality under the storage conditions it will actually meet. It runs to a study plan agreed before the first sample: the storage conditions, the checkpoints, and what is measured at each — microbiological stability, chemical stability such as pH, water activity, peroxide value or TVBN, and sensory acceptability. Real-time studies run the product for its full intended life. Accelerated studies use elevated temperature to reach an indication sooner, and produce an estimate that a real-time study later confirms.

The date on a pack is a claim, and a claim is something you can be asked to evidence. In practice a great many dates in this market are inherited from a similar product or set by judgment, which holds fine until something goes wrong and somebody asks how the date was established. Challenge testing goes a step further, deliberately inoculating the product to establish whether a named pathogen can grow in it during its stated life — the standard evidence for ready-to-eat products, where the answer cannot be safely inferred from composition alone.

Figure · Study checkpoints

Endpoint is whichever fails first. Studies that only test microbiology produce shelf lives that are safe and commercially useless.

What this lane covers

Real-time and accelerated studies, challenge testing
Micro, chemical and sensory checkpoints on one study plan

TRIGGERS

When you need it

You are launching a product

A new product has no date until something gives it one. Carrying the date across from a comparable product is a working assumption, and it is not evidence.

Someone asked how the date was set

Regulators and retail buyers increasingly ask for the substantiation behind a stated shelf life. The study plan and its data are the answer; a confident email is not.

The formulation, process or pack changed

Changing preservative level, water activity, pH, a process step or the packaging can change how long the product holds. A date carried over from the previous version is no longer evidenced, even if it is still correct.

CATALOGUE

Shelf life — parameters

Parameter	Matrix	Reference method	Turnaround
Real-time shelf-life study	Chilled, frozen, ambient	Study plan per product	Per study plan
Accelerated shelf-life study	Ambient and chilled	Elevated-temperature protocol	4–8 weeks
Microbiological stability points	Product over storage	ISO 4833-1, ISO 21528-2, ISO 21527	Per interval
Chemical stability points	Product over storage	pH, aw, peroxide value, TVBN	Per interval
Sensory stability points	Product over storage	ISO 16779	Per interval
Challenge testing	Ready-to-eat products	ISO 20976-1	6–10 weeks
Packaging integrity	Sealed packs	Seal strength and leak testing	5–7 days

Method references and turnaround times shown are indicative and are confirmed in writing before any sample is accepted.

PROCESS

How it works

Send the brief before the sample
The product, the storage conditions it will really meet — not the ones on the label if they differ — the life you are aiming to claim, and whether you need a real-time study, an accelerated indication, or a challenge test. The study plan is written and agreed before anything starts.
Sample requirements confirmed in writing
Shelf-life work needs enough units to cover every checkpoint plus a reserve, all from the same batch, delivered at the start. The count follows directly from the plan and is confirmed with it, because a study that runs short of samples at the final checkpoint cannot be rescued.
On the bench, to a published method
Every determination runs to the ISO, AOAC or APHA method named in the catalogue above, and that reference travels onto the report line rather than sitting in a footnote. Turnaround runs from acceptance at the laboratory, not from the day the sample left you.
Reported so the result can be acted on
Each checkpoint is reported as it completes rather than held to the end, so a product that is failing early is visible while there is still time to change the formulation instead of the date.

What you get back

The agreed study plan, a result set at every checkpoint as it completes, and a closing report stating what the data supports. The plan and the data together are the substantiation — the number on the pack is only the conclusion.

Service facts

Parameter	Value	Note
Live service status	[VERIFY: Which testing services are actually LIVE]	Published as orderable only when the lab confirms it.
Accreditation position	Accredited. Certificate N-T-00607 covers food and agricultural microbiological testing to ISO/IEC 17025:2017.	Stated plainly, never implied by a badge.
Sample requirements	Confirmed to you in writing before dispatch. Container, quantity, temperature and hold time change with the parameter and the matrix, so they are issued per request rather than published as one list.	Per-parameter detail publishes with the confirmed method list.

Q+A

Common questions

Shelf life

Can you just confirm the shelf life I already print?

A study generates the evidence — it either supports your printed date or shows that it does not hold, and you need to be ready for either answer. Expiry dating in Saudi Arabia sits within SFDA.FD 150-1 and SFDA.FD/GSO 150-2; the study is the technical file behind whatever date you declare.

Real-time or accelerated — which do I need?

Real-time is the definitive answer: the product, at its storage condition, for its intended life. Accelerated conditions trade time for an estimate and are useful when a launch cannot wait — but an accelerated estimate should be verified in real time. The laboratory confirms the study design in writing before anything starts.

What is a challenge study, and when would I need one?

The product is deliberately inoculated with the organism of concern to see whether it supports growth over its life. It answers a question ordinary shelf-life testing cannot: not whether the organism is present, but what happens if it ever gets in. It matters most for products eaten without a kill step.

How long does a real-time study take?

As long as the shelf life you intend to claim — that is the nature of real time, and no honest laboratory shortens it. The design, duration and test points are confirmed in writing before the study begins, so the timeline is known on day one.

My product already has a customary shelf life in the market — why test?

A customary date is not evidence for your formulation, your process and your packaging. When a customer, an auditor or SFDA asks what stands behind the date, the answer needs to be a study on your product — not a competitor’s habit.

Send the sample question or the instrument list. It is read by a bench professional, not routed through a ticket queue. Confirmed phone, mailbox and address publish here at launch.

Submit a sample Contact

CONTINUE