🍽️ Real-Time · Accelerated · Microbiological · Physicochemical · Sensory · CAA · ICMSF

Food Shelf Life Studies

Determine your product's expiry date — with the scientific evidence to defend it.

Biogroup has the experience and equipment to determine the shelf life of any food product — through real-time studies, accelerated shelf life testing (ASLT), mathematical modelling of microbial growth and physicochemical stability monitoring. Results provide the technical justification required by ANMAT, CAA, SENASA and international food safety authorities.

A correctly determined shelf life protects consumers, satisfies regulatory requirements and supports commercial decisions — from launch date declarations to export market access and retail buyer qualification.

Real-time + ASLT
Both study types
Micro + FQ + Sensory
Three evaluation dimensions
CAA · ANMAT · ICMSF
Regulatory compliance
+35 years
Food safety expertise
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Safety
The product remains safe for consumption — microbiological hazards (pathogens, spoilage organisms) have not reached unsafe levels. The primary non-negotiable criterion for expiry date determination.
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Quality
The product preserves its desired sensory, physicochemical, microbiological and functional characteristics — colour, texture, flavour, aroma, appearance and nutritional profile remain within acceptable limits.
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Claims compliance
Where applicable, the product complies with any nutritional or health claim throughout its declared shelf life — vitamins, minerals, probiotics and bioactive compounds remain at or above declared levels under recommended storage conditions.
When a shelf life study is required or recommended
Regulatory triggers and business circumstances
Under Argentine CAA and ANMAT requirements, shelf life must be technically justified — not assigned by the manufacturer without supporting data.
🆕 New product development
Every new food product requires a shelf life study before launch — the scientific basis for the expiry date declared on the label.
🔄 Process modification
Changes in formulation, ingredients, thermal treatment, packaging or production equipment may alter the shelf life — re-study required.
📦 New packaging
Change of packaging material, modified atmosphere, active packaging or new sealing system can significantly affect stability.
🌍 Export market access
International buyers, retailers and food safety authorities in Europe, USA and elsewhere require documented shelf life studies.
⏳ Shelf life extension
Extending an existing product's expiry date requires new study data — regulatory and commercial justification.
🏷️ Labelling compliance
ANMAT and CAA require that "best before" and "use by" dates are technically justified and not arbitrarily assigned.
Deterioration mechanisms — understanding what limits shelf life
Every product has a dominant deterioration mechanism — identifying it correctly determines the right study design
Before designing a shelf life study, Biogroup identifies the primary intrinsic and extrinsic factors that govern the stability of the specific product — because the wrong study design produces a meaningless result.
🦠 Microbiological
Growth of spoilage organisms (moulds, yeasts, LAB, pseudomonads) causes off-odours, off-flavours, discolouration and textural changes.

Growth of pathogens (Salmonella, L. monocytogenes, E. coli, B. cereus, C. perfringens, S. aureus) creates safety hazards without necessarily visible signs of spoilage.

Limiting factor for: fresh, chilled and minimally processed foods.
⚗️ Chemical & physicochemical
Lipid oxidation — rancidity in oils, fatty foods, nuts, snacks. Measured as peroxide value, TBARS, anisidine value.

Maillard browning — non-enzymatic browning in heat-processed and dried foods. Loss of colour and nutritional value.

Hydrolysis — starch retrogradation, protein denaturation, vitamin degradation, loss of colour (anthocyanins, chlorophylls).

Limiting factor for: ambient-stable, dried and high-fat products.
👁️ Sensory / physical
Moisture migration — staling, caking, crispness loss, water activity change affecting microbiological stability.

Textural changes — softening, syneresis, emulsion breakdown, crystallisation, starch retrogradation.

Colour and appearance — pigment degradation, surface discolouration, visible mould, pack integrity failure.

Limiting factor for: bakery, confectionery, beverages and fresh-cut produce.
Intrinsic and extrinsic factors governing shelf life

The stability time of a food product is determined by the interaction of intrinsic factors (product composition) and extrinsic factors (storage and distribution conditions). Understanding both is essential before designing any shelf life study or selecting storage conditions for accelerated testing.

Intrinsic factors — product properties
Water activity (aₓ)
The single most important predictor of microbial stability and chemical reaction rates
pH
Controls microbial spectrum and growth rate; hurdle technology
Oxidation-reduction potential (Eh)
Aerobic vs. anaerobic conditions; affects microbial ecology
Chemical composition
Fat, protein, carbohydrate, water content — substrate availability
Antimicrobial factors
Natural inhibitors: lysozyme, organic acids, phenolics, spices
Physical structure
Emulsion stability, gel strength, packaging barrier properties
Extrinsic factors — storage & handling
Temperature
Most critical extrinsic factor — governs microbial growth rate and all chemical reaction rates
Relative humidity
Moisture migration through packaging; surface mould; caking
Atmosphere composition
O₂, CO₂, N₂ — MAP/CAP and effect on microbial ecology
Light exposure
Photodegradation of vitamins, pigments, lipids; off-flavour formation
Packaging integrity
Barrier properties to O₂, moisture, light, aroma migration
Microbial contamination
Initial contamination level at packing — the starting point
Study types — real-time vs accelerated shelf life testing
📅 Real-Time Shelf Life Study
Definitive · highest evidential value · required for regulatory submission

Products are stored under defined conditions representing intended storage (temperature, humidity, light) and analysed at regular intervals throughout the full proposed shelf life. All three deterioration dimensions are monitored: microbiological, physicochemical and sensory.

Advantages:
✓ Highest evidentiary value for regulatory purposes
✓ Reflects real distribution conditions
✓ No model assumptions or extrapolations required
✓ Suitable for all food types including complex matrices

Typical applications:
New product launches · regulatory submissions · export buyer qualification
⚡ Accelerated Shelf Life Testing (ASLT)
Faster results · Arrhenius kinetics · Q10 factor · mathematical models

Products are stored at elevated temperatures (or other stress conditions) and the rate of deterioration is measured. Mathematical models — Arrhenius equation, Q10 factor, predictive microbiology — are applied to extrapolate the shelf life at normal storage temperature.

Advantages:
✓ Results in weeks rather than months
✓ Cost-effective for product development iterations
✓ Useful for establishing starting point before real-time study
✓ Suitable for chemically dominated deterioration

Limitations:
✗ Not reliable for microbiologically limited products
✗ Model assumptions must be validated
Mathematical modelling — predictive microbiology and kinetic models
Models that translate laboratory data into shelf life predictions
Probabilistic and deterministic mathematical methods for shelf life estimation — as referenced in the Argentine CAA and international standards.
Arrhenius model
Chemical deterioration kinetics
Describes the temperature dependence of reaction rates (oxidation, browning, vitamin degradation). Basis of all accelerated testing — the activation energy Ea is measured and the Q10 factor calculated for extrapolation.
Gompertz / Baranyi
Microbial growth modelling
Sigmoidal growth curve models that describe lag phase, exponential growth and stationary phase. Used to predict time to reach critical microbial loads (e.g. 10⁶ CFU/g) as a function of temperature and other factors.
ComBase / ICMSF models
Predictive microbiology databases
ComBase and ICMSF Microorganism Challenge Testing (MCT) databases provide validated growth/survival parameters for foodborne pathogens and spoilage organisms as functions of temperature, pH, aₓ and other factors.
Q10 factor
Temperature acceleration factor
The ratio of deterioration rates at temperatures differing by 10°C. Typically Q10 = 2–3 for chemical reactions. Directly converts accelerated test duration to predicted real-time shelf life.
Water activity models
Moisture-stability relationships
Sorption isotherm models (BET, GAB) relate moisture content to water activity. Critical for predicting caking, crisping loss, mould growth and chemical reaction rates in dried and low-moisture products.
Survival analysis
Consumer acceptance modelling
Probabilistic approach that models the time at which a defined proportion of consumers (e.g. 50%) would reject the product — the "sensory shelf life" defined by consumer acceptance thresholds.
Parameters monitored during shelf life studies
🦠 Microbiological
• Total aerobic plate count (TAPC)
• Yeasts and moulds
• Lactic acid bacteria (LAB)
• Coliforms and E. coli
• Salmonella (presence/absence)
• Listeria monocytogenes
• Staphylococcus aureus
• Bacillus cereus
• Anaerobic spore-formers
• Challenge testing (ICMSF MCT)
⚗️ Physicochemical
• Water activity (aₓ)
• pH · titratable acidity
• Moisture content (%)
• Peroxide value (lipid oxidation)
• TBARS · anisidine value
• Colour (L*a*b* CIE) · browning
• Texture (TPA) · viscosity
• Syneresis · phase separation
• Vitamin stability (C, B1, B2, folate)
• Protein denaturation markers
👁️ Sensory
• Trained panel evaluation
• Appearance · colour · texture
• Flavour · aroma · off-notes
• Quantitative Descriptive Analysis (QDA)
• Difference tests (triangle, duo-trio)
• Consumer acceptance testing
• Sensory shelf life endpoint (Just-About-Right)
• Off-flavour profiling
• Electronic nose (e-nose) for volatile profile
• Survival analysis (consumer rejection rate)
Food categories we work with
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Fresh & processed meat
Chilled · cured · vacuum-packed · RTE
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Fish & seafood
Fresh · smoked · frozen · marinated
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Dairy products
Milk · cheese · yoghurt · cream · butter
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Eggs & egg products
Shell eggs · pasteurised · dried
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Bakery & cereals
Bread · pastry · biscuits · pasta · breakfast cereals
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Fresh-cut produce
Salads · vegetables · fruits · minimally processed
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Beverages
Juices · dairy drinks · functional beverages · water
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Condiments & sauces
Mayonnaise · dressings · jams · spreads
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Canned & retort foods
Sterilised · commercially shelf-stable products
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Confectionery
Chocolate · sweets · snack bars · gummy products
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Herbs & spices
Dried · ground · blends · essential oils
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Frozen foods
Vegetables · meat · ready meals · ice cream
Regulatory framework — Argentine and international requirements
🇦🇷 Argentine regulations
• CAA — Código Alimentario Argentino (date labelling requirements)
• ANMAT — Resolution 2025/93 (product registration)
• SENASA — animal-origin product shelf life requirements
• INAL — Instituto Nacional de Alimentos food safety criteria
• Resolution 301/22 — ANMAT food labelling
• Provincial food safety regulations
🌐 International standards & methods
• EU Reg. 2073/2005 — microbiological criteria for foodstuffs
• EU Reg. 1169/2011 — food labelling ("best before" / "use by")
• ICMSF — microbiological sampling and testing protocols
• FDA 21 CFR — US shelf life and dating requirements
• ISO 11290 / ISO 6579 — pathogen detection methods
• Codex Alimentarius — food safety principles
Analytical methods applied
Reference method organisations applied at Biogroup for shelf life analysis
ISO
International Organization for Standardization
ISO 4833 (plate count) · ISO 6579 (Salmonella) · ISO 11290 (Listeria) · ISO 6888 (S. aureus)
ICMSF
Int. Commission on Microbiological Specifications for Foods
Sampling plans · challenge testing · risk-based microbiological criteria
AOAC
Association of Official Analytical Chemists
Official methods for chemical analysis — oxidation indices, vitamins, proximate analysis
FDA
Food and Drug Administration
Bacteriological Analytical Manual (BAM) · pathogen detection methods
APHA
Standard Methods (AWWA/APHA/WEF)
Water, dairy and food microbiological methods
AFNOR
Association française de Normalisation
French standards for food microbiological and physicochemical analysis
ISO/IEC 17025
Laboratory accreditation
Biogroup operates under ISO/IEC 17025 quality management principles for traceable results
Codex
Codex Alimentarius
General principles of food hygiene · HACCP · microbiological criteria
USP / BP / FNA
Pharmacopoeial methods
Applied to nutraceuticals, functional foods and products with pharmaceutical analogy
What Biogroup delivers

The shelf life study report provides the scientific evidence for the expiry date declared on your product label and in your regulatory registration dossier.

Study design protocol with sampling plan and measurement intervals
Full analytical results at each time point with statistical analysis
Microbiological, physicochemical and sensory evolution curves
Identification of the primary deterioration mechanism and rate
Mathematical model fit (Arrhenius, Gompertz or water activity model)
Predicted shelf life with confidence interval
Recommended storage conditions and critical control points
Comparison against CAA/ANMAT regulatory microbiological criteria
Technical justification for the proposed expiry date declaration
Report format accepted by ANMAT, SENASA and international buyers
Related services
Real-time · Accelerated · Microbiological · Physicochemical · Sensory · CAA · ICMSF
Need a shelf life study for your product?
From a rapid accelerated study for product development to a full real-time study for regulatory submission — Biogroup has the experience and equipment to determine the shelf life of any food product.
Request a shelf life study →
📞 +54 341 425-6431 📞 +54 341 447-4486 ✉ biogroup@biogroup.com.ar 📍 3 de febrero 920 · Rosario, Argentina Mon–Fri 08:00–17:00