Polycyclic aromatic hydrocarbons' formation and occurrence in processed food

Area of Science:

• Food Science
• Environmental Health
• Toxicology

Background:

• Polycyclic aromatic hydrocarbons (PAHs) are prevalent contaminants found across various processed food categories, including dairy, nuts, herbs, beverages, and meat products.
• Formation of PAHs is linked to diverse thermal processing techniques such as roasting, barbecuing, grilling, smoking, heating, drying, and baking.

Purpose of the Study:

• To provide a comprehensive review of the impact of dietary intake of PAHs.
• To elucidate the formation mechanisms and levels of PAHs in processed food items.
• To assess potential interventions for preventing and reducing PAH contamination.

Main Methods:

• Literature review synthesizing existing research on PAH formation and occurrence in processed foods.
• Analysis of factors influencing PAH levels, including cooking methods, fuel type, processing intensity, and duration.
• Evaluation of food processing steps that can enhance PAH levels, such as reuse, conching, concentration, crushing, and storage.

Main Results:

• PAH levels are significantly influenced by cooking parameters (heat source distance, fuel, duration, method) and processing techniques.
• Certain food processing steps (e.g., reuse, conching, storage) can increase PAH concentrations in specific food products.
• Dietary intake of PAHs from processed foods represents a significant exposure route for the general population.

Conclusions:

• Understanding PAH formation pathways is crucial for mitigating contamination in the food supply.
• Effective strategies are needed to prevent and reduce PAH levels in processed foods to minimize dietary exposure.
• Further research is required to address knowledge gaps and explore innovative reduction techniques.