Food Additives and Contaminants

Food Additives and Contaminants encompass a wide range of chemicals intentionally added to or unintentionally present in food, with significant implications for food safety and toxicology. This topic is essential for Zambian tertiary students in food science, nutrition, public health, and toxicology. It covers the purpose of additives as preservatives, antioxidants, flavourings, colourings, and processing aids, alongside examples like nitrites, sulphites, and synthetic dyes. The toxicological evaluation and regulatory status (e.g., GRAS - Generally Recognized As Safe) of these substances are discussed. Concurrently, the topic addresses chemical contaminants, including heavy metals (lead, cadmium), pesticides, mycotoxins (e.g., aflatoxin), and packaging migrants. The principles of risk assessment, acceptable daily intake (ADI), and the potential for synergistic interactions between multiple chemicals are explored. Understanding this topic is crucial for university examinations and for future roles in ensuring food safety, developing regulations, and protecting public health from dietary toxicants within Zambia's food supply chain.