Food regulation exists because of documented practices that would now be criminal, and the specific rules trace to specific scandals.
The adulteration problem
Nineteenth-century analysis of food sold in major cities found widespread adulteration.
Bread bulked with alum and chalk. Tea leaves dried and resold. Milk diluted and coloured. Confectionery coloured with compounds containing lead and arsenic.
Which caused documented deaths, and the analytical chemistry demonstrating it was itself an innovation.
The legislative response
Laws prohibiting adulteration, establishing analysts and creating penalties.
Which developed over decades and were initially weak, with proof requirements that made enforcement difficult.
Strengthening followed further scandals, which is the recurring pattern in this area.
Standards of identity
Defining what a food must contain to be sold under a name.
Which prevents selling something under a name consumers understand to mean something else.
Disputes about these definitions continue, particularly regarding plant-based products using names associated with animal products.
Additives
Permitted lists with defined purity standards and usage limits developed through the twentieth century.
Which requires safety assessment before permission, and substances have been removed when evidence changed.
The identifying number systems used in several regions are identifiers rather than indicators of anything about safety.
Microbiological safety
Pasteurisation, refrigeration and hygiene requirements addressed foodborne infection.
Which produced substantial reductions and was contested at introduction, particularly pasteurisation of milk.
Hazard analysis approaches, identifying critical control points in a process, became the standard framework and are required in many jurisdictions.
Traceability
Requirements to identify the immediate supplier and customer of any food.
Which enables recall and outbreak investigation, and it was strengthened substantially following specific incidents.
The horsemeat incident in Europe demonstrated that complex supply chains could substitute ingredients undetected, and it prompted testing and traceability changes.
Labelling
Requirements to declare ingredients, allergens, nutrition and origin developed progressively.
Which followed evidence of harm from undeclared allergens specifically, with legislation in several countries named after individuals who died.
International trade
Different national standards create trade barriers, addressed through international standard-setting bodies.
Which produces reference standards that countries may adopt, and disputes about whether a standard is genuine protection or disguised protectionism are common.
Mutual recognition and equivalence agreements allow trade where standards differ but achieve comparable outcomes.
Novel foods
Foods without a history of consumption require assessment before sale in many jurisdictions.
Which covers new ingredients, new production processes and foods from sources not previously eaten locally.
Cultivated meat and precision fermentation products are currently working through these frameworks in several jurisdictions.
Genetically modified organisms
Regulated differently between jurisdictions, with process-based and product-based approaches producing different outcomes.
Which means the same product can be tightly regulated in one place and unregulated in another.
Newer gene editing techniques have prompted reconsideration of whether existing frameworks apply.
Enforcement capacity
Inspection frequency and laboratory capacity determine whether rules produce compliance.
Which has declined in several jurisdictions under budget pressure, and outbreak investigations have identified inspection gaps.
Imported food
Border checks, equivalence agreements and third-country establishment approval govern imports.
Which means the exporting country's system is being relied upon, and audits of those systems are the verification mechanism.
Allergen requirements
Mandatory declaration of specified allergens, with emphasis requirements in ingredient lists.
Which followed deaths from undeclared allergens, and legislation in several countries is named after individuals.
Requirements for food packed for direct sale were strengthened following specific cases where pre-packed food carried no ingredient list.
Date marking
Use-by relates to safety, best-before to quality.
Which is poorly understood and generates substantial avoidable waste.
Several retailers have removed best-before dates from fresh produce specifically for this reason.
Food fraud
Substitution, dilution and misrepresentation of origin.
Which is economically motivated rather than a safety failure, and it can produce safety consequences incidentally.
Analytical techniques including isotope analysis and DNA testing have made detection considerably more effective.
Reporting
Suspected foodborne illness can be reported to public health authorities, and reports are a primary input into outbreak detection.
Hygiene rating schemes
Publishing inspection results for food businesses.
Which has measurable effects on both compliance and on consumer choice where display is mandatory.
Voluntary display produces smaller effects, since poor performers do not display.
Home and small-scale production
Regulations apply to businesses regardless of scale, with registration requirements for anyone selling food.
Which catches people selling from home, and guidance for small operations is published by food authorities.
Consumer behaviour
A substantial proportion of foodborne illness originates in domestic kitchens rather than in commercial settings.
Which is addressed through public information on storage, cooking temperatures and cross-contamination.
Home refrigeration temperature is frequently above the recommended level in surveys, which is a simple and consequential thing to check.
Antimicrobial use in agriculture
Substantial quantities of antimicrobials are used in food animal production in several countries.
Which contributes to resistance, and restrictions on prophylactic and growth-promotion use have been introduced in some jurisdictions.
Surveillance of use and of resistance in food animals is published where it is collected.