Invisible, heat‑stable, and hazardous: What cereulides mean for food safety

Food safety in Europe is currently under intense scrutiny. The reason lies in large-scale preventive recalls of infant formula and follow on milk products, which have sharpened awareness of risks that were previously underestimated.

The trigger for these recalls is a heat stable toxin produced by the bacterium Bacillus cereus: cereulide. A compound capable of withstanding thermal processing steps such as pasteurization or spray drying without degradation.

International food manufacturers, including well known global brands, are tightening their internal control systems. At the same time, contract laboratories, manufacturers, and raw material suppliers are facing increasing pressure to establish reliable analytical methods for the accurate determination of cereulide.

What Is Cereulide and Where Does the Risk Lie?

Cereulide is a cyclic dodecadepsipeptide produced by certain emetic strains of Bacillus cereus. It is extremely heat stable, acid resistant, and toxic even at very low concentrations.

For this reason, traditional microbiological testing is insufficient. The presence or absence of Bacillus cereus as a microorganism alone does not provide reliable information, since even microbiologically clean products may still contain relevant levels of cereulide.

This poses a particularly critical risk for:

• Infant formula and baby food
• Dairy products and milk derived ingredients
• Nutraceuticals and dietary supplements
• Lipid rich raw materials (e.g. ARA or DHA oils)

Regulatory Attention Is Increasing Dramatically

Although there are currently no harmonized European maximum limits for cereulide, the trend is unmistakable:

• Authorities increasingly demand toxin focused risk assessments
• Audit requirements are shifting from microbial counts to toxicological parameters
• Method validation and retention samples are gaining importance

For laboratories, this means expanding analytical expertise, investing in robust and validated methods, and using appropriate reference standards.

LC MS/MS as the Gold Standard for Cereulide Analysis

Due to its structural properties and the low detection limits required, LC MS/MS analysis has become the method of choice for cereulide determination. Key success factors include:

• High purity reference standards
• Isotope labeled internal standards to compensate for matrix effects
• Reproducible sample preparation, especially for complex matrices

Validated Solutions for Reliable Cereulide Determination

To enable laboratories and manufacturers to implement cereulide testing safely and effectively, Pribolab offers a purpose designed portfolio for cereulide analysis:

Isotope Labeled Internal Standards

• ¹³C₆ Cereulide – 10 µg/mL (acetonitrile)
• ¹³C₆ Cereulide – 20 µg/mL (acetonitrile)

Ideal for quantitative LC MS/MS methods, accurate matrix correction, method validation, and routine analysis.

Native Reference Standards

• Cereulide – 10 µg/mL (acetonitrile)
• Cereulide – 50 µg/mL (acetonitrile)

Applications include calibration curves, recovery studies, and quality assurance.

Sample Preparation

• SPE columns for improved sample cleanup
• Optimized for challenging food matrices
• High recovery rates and analytical stability

Key Application Areas

Demand for cereulide analysis is growing particularly in the following areas:

• Infant formula and baby food
• Dairy products and whey powders
• Nutritional powders and clinical nutrition
• Raw material screening (e.g. ARA oils)
• Contract laboratories and regulatory testing labs
• Method development & validation

Opportunities for Laboratories and Manufacturers

Current developments represent not only a regulatory challenge but also a strategic opportunity:

• Differentiation through an expanded analytical portfolio
• Early compliance with future regulatory requirements
• Stronger positioning as a quality and safety driven provider

Organizations that act now build trust with customers, partners, and authorities alike.

We are actively working towards ISO 17034 certification. Given the complexity of the accreditation process, completion will require additional time.

Our Conclusion: Cereulide Is Here to Stay

Recent events clearly demonstrate that toxin based food safety is gaining significant importance. With validated standards, well designed sample preparation solutions, and strong analytical expertise, associated risks can be reliably controlled.

→ We are pleased to support our customers in implementing these requirements efficiently and in a future proof manner.

→ Contact us for further information, technical datasheets, or a tailored quotation.