Aflatoxins: Carcinogenic Mycotoxins in Food

Aflatoxins (AFL)

What are Aflatoxins?

Aflatoxins (AFL) are among the most dangerous and widespread mycotoxins. They are primarily produced by the mold species Aspergillus flavus and Aspergillus parasiticus and occur mainly in warm, humid climates.

Chemically, aflatoxins are coumarin derivatives with a difuran structure. There are several main types: Aflatoxin B1, B2, G1, and G2, with Aflatoxin B1 being the most potent naturally occurring carcinogen identified to date.

Where do Aflatoxins Occur?

Aflatoxins can be detected in various foods, particularly in:

  • Nuts (peanuts, pistachios, hazelnuts, almonds)
  • Dried fruits (figs, raisins, dates)
  • Spices (chili, pepper, nutmeg)
  • Cereals (corn, rice, wheat)
  • Oilseeds (cottonseed, sunflower seeds)
  • Cocoa and coffee

Contamination is particularly problematic when storage occurs under warm and humid conditions. Even in Europe, aflatoxins can increasingly occur in imported and stored products due to climate change.

Health Risks from Aflatoxins

Aflatoxins are highly hazardous to health and can cause both acute and chronic poisoning:

Acute Toxicity

  • Liver damage (hepatotoxicity)
  • Immunosuppression
  • Acute poisoning can be fatal (aflatoxicosis)

Chronic Toxicity

  • Liver cancer (hepatocellular carcinoma)
  • Growth retardation in children
  • Impairment of the immune system
  • Possible mutagenic and teratogenic effects

The International Agency for Research on Cancer (IARC) classifies Aflatoxin B1 as a Group 1 carcinogen – a substance proven to cause cancer in humans.

Limit Values and Regulation

In the European Union, strict limit values apply for aflatoxins in food:

Food Product Limit Aflatoxin B1 Limit Total Aflatoxins
Nuts 2 µg/kg 4 µg/kg
Dried fruits 2 µg/kg 4 µg/kg
Spices 5 µg/kg 10 µg/kg
Cereals 2 µg/kg 4 µg/kg

For infant and baby food, even stricter limits of only 0.1 µg/kg apply.

Aflatoxin Detection with SAFIA

SAFIA offers innovative testing solutions for fast and reliable detection of aflatoxins in various food matrices.

Advantages of SAFIA Technology:

✓ Multiplex analysis – Detect multiple mycotoxins simultaneously
✓ Fast results – Results in under 30 minutes
✓ High sensitivity – Precise detection of even the lowest concentrations
✓ User-friendly – No complex laboratory equipment necessary
✓ Validated – Complies with EU regulations and international standards

Prevention and Control

To minimize aflatoxin contamination, various measures are necessary:

Agricultural Measures

  • Cultivation of resistant varieties
  • Optimal harvest times (avoiding overripeness)
  • Rapid drying after harvest
  • Avoidance of plant stress (irrigation, nutrient supply)

Storage and Processing

  • Dry storage (moisture content < 15%)
  • Temperature control (< 15°C optimal)
  • Regular checks for mold formation
  • Sorting of contaminated products

Analytical Control

  • Regular testing of raw materials
  • Incoming goods inspection
  • Batch release based on analytical results
  • Traceability in the supply chain

Conclusion

Aflatoxins represent one of the biggest challenges for food safety. Through preventive measures, strict controls, and modern analytical methods such as SAFIA technology, risks can be minimized and consumers protected.

Consistent monitoring of aflatoxin contamination is essential to ensure both compliance with legal requirements and the protection of public health.