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Microbial mutagenicity screening of natural flavouring substances

R Crebelli1, G Aquilina, L Conti

  • 1Istituto Superiore di Sanità, Rome, Italy.

Microbiologica
|April 1, 1990
PubMed

Insights

Mutagenic activity was found in natural flavorings, specifically onion and garlic extracts. Further analysis suggests specific mutagenic flavones may be responsible for these genotoxic effects.

Area of Science:

  • Food Science
  • Toxicology
  • Genetics

Background:

  • Natural flavorings are widely used in food products.
  • Assessing the safety of food additives is crucial for public health.
  • Previous studies have indicated potential genotoxicity in some natural compounds.

Purpose of the Study:

  • To screen commercial natural flavoring substances for mutagenicity.
  • To identify specific flavorings exhibiting mutagenic activity.
  • To investigate the potential mechanisms behind observed genotoxicity.

Main Methods:

  • Sixty-five commercial natural flavoring samples were tested.
  • Bacterial mutagenicity assays were performed using Salmonella typhimurium strains TA98 and TA100.
  • Tests were conducted with and without exogenous metabolic activation to assess different mutagenic pathways.

Main Results:

  • Significant mutagenic activity was detected in onion and garlic extracts.
  • Mutagenic effects were observed in both the presence and absence of metabolic activation.
  • The mutagenicity patterns across different Salmonella strains suggest the involvement of specific flavones.

Conclusions:

  • Onion and garlic extracts possess mutagenic properties.
  • Mutagenic flavones are likely contributors to the genotoxicity of these natural flavorings.
  • These findings highlight the need for careful evaluation of natural flavorings in food safety assessments.

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