Shelf life, Sterility, Preservative efficacy

Food and pharmaceutical products change over time. Microbes grow, preservatives weaken, and flavour, texture and safety shift along with them. METS Laboratories is one of the leading chemical testing labs in UAE, and we also test how products hold up over time. Our shelf life testing, sterility testing and preservative efficacy testing show how long a product stays safe and how well it resists contamination. As a result, manufacturers can set honest shelf life claims, meet regulations and protect their brand reputation.

What Are Shelf Life, Sterility and Preservative Efficacy Testing?

These three tests answer different questions about the same product.

• Shelf life testing: Shows how a product performs over time and also when quality starts to drop.
• Sterility testing: Confirms that no viable microorganisms remain after sterilization.
• Preservative efficacy testing: Shows how well a product resists microbial contamination, even during use.

Shelf Life Testing for Food Products

Food products must meet national and international hygiene regulations on shelf life, so accurate shelf life testing keeps consumers safe and your company compliant. METS Laboratories follows each product through its shelf life using four types of analysis.

• Microbial indicator analysis: Tracks microbial growth as the product ages, because microbes drive spoilage.
• Sensory testing: Checks taste, smell and appearance, since consumers notice these first.
• Physical testing: Also checks texture and other physical changes.
• Chemical testing: Measures changes in composition over time.

The results of shelf life testing also help you improve the product, because they show what drives shelf life.

• Performance over time: You see how your product changes, for example, from day one to the end of its shelf life.
• Ingredient and packaging changes: You can then identify the changes that lengthen shelf life.
• Profit: A longer shelf life reduces waste and increases profit.
• Contributing factors: The starting microbial load, preservatives and antioxidants all affect shelf life and final quality.

Sterility Testing and Sterilization

Sterilization is the complete destruction or elimination of all viable organisms in or on an object, and sterility testing confirms that it worked.

• What it destroys: Yeast, vegetative bacteria and spore formers.
• Ambient storage: Food processors can then store and distribute sterilized products at ambient temperature.
• Longer shelf life: Removing microbes therefore extends shelf life.
• Starting microbial load: A product’s initial microbial load greatly affects shelf life, especially for perishable items.

Preservative Efficacy Testing

Preservative efficacy testing measures the antimicrobial activity of a product and shows how well it withstands microbial contamination during use. Preservatives and antioxidants extend shelf life, so this test matters most for pharmaceutical and food products with a higher risk of contamination. The test gives two main benefits.

• Right preservative level: It shows the maximum amount of preservative the product should contain.
• Limit check: It confirms that the product stays within its stated preservative limits and works effectively.

Chemical Testing at METS Laboratories

Chemical testing checks material quality by identifying what a product contains and whether anything is present that should not be, according to relevant standards and regulations.

• Composition analysis: Also called elemental analysis, it shows which elements are present (qualitative) and how much of each (quantitative). Spectroscopy also often identifies the composition and any impurities.
• Trace contamination detection: It finds particles, cloudiness, surface residue or leftover chemicals, so manufacturers can fix the cause.
• Metals testing: It determines the composition of metals and alloys, and it detects foreign metallic substances. The process is usually non-destructive, but alloys often need breaking down.
• Material testing: It also checks the quality and properties of materials.
• Regulatory testing: It checks compliance with ASME, ISO, REACH, RoHS and CPSIA requirements, so hardlines and softlines avoid rejection or recall in the destination market.

Why Choose METS Laboratories for Shelf Life Testing?

Our shelf life testing follows the product, not just a single test, and four points set it apart.

• Product-specific plans: We track each product through its whole shelf life instead of running one check.
• Qualified food scientists: On-site scientists run every test under a rigorous quality control program.
• Combined results: Shelf life testing data, including microbial, sensory, physical and chemical results, come together in one place.
• Accredited laboratories: METS operates ISO 17025-accredited labs in several countries, keeping the process reliable, efficient, and cost-effective.

A product can look fine on day one and still fail before its expiry date. Shelf life testing, sterility testing and preservative efficacy testing show you where and when that happens. Then you can adjust ingredients, packaging or preservatives before problems reach the market. Contact METS Laboratories to discuss the right testing plan for your product.