Key Food Safety Issues and How to Address Them

Every time you pick up a food item from a store shelf, you trust that it’s safe to eat. But the journey food takes from farm to fork is full of potential hazards – from pesticide residues and microbial contamination to antibiotic residues and environmental pollutants. Food safety is the discipline that works to keep those risks in check. Understanding key food safety issues is important not just for food professionals, but for every consumer who wants to make informed choices about what they eat.

Why food safety matters 🔗

Foodborne illnesses affect hundreds of millions of people worldwide each year. According to the World Health Organization (WHO), contaminated food causes an estimated 600 million cases of foodborne diseases and approximately 420,000 deaths annually. These illnesses are caused by bacteria, viruses, parasites, chemical substances, and other contaminants that enter the food supply at various stages – during growing, harvesting, processing, storage, or preparation.

The goal of food safety is not to eliminate every conceivable risk (which would be practically impossible without shutting down the food supply), but to reduce hazards to a reasonable and acceptable level. This requires a combination of regulatory standards, scientific monitoring, industry practices, and consumer awareness.

Major food safety issues 🔗

Several categories of food safety concerns affect the global food supply today. Let’s look at the most significant ones.

Food additives 🔗

Food additives are substances intentionally added to food to preserve flavour, enhance taste or appearance, or extend shelf life. Common examples include preservatives, artificial colourants, sweeteners like aspartame, and emulsifiers. While most approved additives are generally considered safe, concerns continue to surface about their long-term health effects.

In 2025, the United States banned Red Dye No. 3 (erythrosine), and the European Union implemented a ban on bisphenol A (BPA) in food contact materials. These regulatory actions reflect growing evidence that some chemicals long considered safe may carry risks that earlier assessments underestimated. The U.S. Food and Drug Administration (FDA) has been working to strengthen post-market assessment of food chemicals, including additives, contaminants, and substances classified as “generally recognized as safe” (GRAS).

A key concern with the current system is that some manufacturers can self-certify their additives as safe under the GRAS designation, without independent FDA review. This has led to calls for more rigorous oversight and periodic re-evaluation of approved substances.

Antibiotic residues in food 🔗

Antibiotics are widely used in livestock farming – not just for treating sick animals, but also for disease prevention and, in some regions, for growth promotion. This practice has become a major global health concern because it contributes to antimicrobial resistance (AMR), where bacteria evolve to survive antibiotic treatments.

It is estimated that over 70% of global antimicrobials are used in food-producing animals, particularly in countries with large livestock industries such as China, Brazil, and the United States. Resistant bacteria from animals can transfer to humans through contaminated meat, eggs, milk, or even through the environment via agricultural runoff.

The WHO recommends that farmers and the food industry stop using antibiotics in healthy animals for growth promotion and disease prevention. The European Union banned antibiotic growth promoters in 2006, and its Farm to Fork strategy targets a 50% reduction in veterinary antimicrobial sales by 2030. In the United States, the FDA has been working on antimicrobial stewardship programmes to limit non-essential antibiotic use in food animals. Despite these efforts, a 2025 FDA report showed that sales of medically important antibiotics for livestock actually rose in 2024, indicating that much work remains.

Food irradiation 🔗

Food irradiation is a processing technique that exposes food to ionizing energy – from gamma rays, electron beams, or X-rays – to kill bacteria, parasites, and insects. It is used for pathogen reduction, shelf-life extension, insect control, and sprout inhibition in products like spices, fruits, vegetables, and meat.

According to the U.S. Environmental Protection Agency (EPA), irradiation does not make food radioactive. The process works by breaking chemical bonds in the DNA of harmful organisms, preventing them from multiplying. The FDA evaluates irradiated food across four areas: radiological safety, toxicological safety, microbiological safety, and nutritional adequacy.

Despite strong scientific backing – food irradiation is approved for use in over 55 countries – consumer acceptance remains a challenge. Public concerns often stem from misconceptions about radioactivity, though health agencies including the WHO and FAO confirm the process is safe when proper dosing is followed. Irradiation is best used as a complement to, not a replacement for, good hygiene and manufacturing practices.

Microbiological contamination 🔗

Microbial contamination is arguably the most common and immediate food safety threat. Pathogens like Salmonella, E. coli, Listeria, Campylobacter, and Staphylococcus aureus can contaminate food at any stage, from farm to table. These organisms cause illnesses ranging from mild gastroenteritis to severe, life-threatening infections.

Contamination typically occurs through poor hygiene during handling, inadequate cooking temperatures, cross-contamination between raw and cooked foods, or improper storage conditions. Fresh produce, poultry, seafood, dairy products, and ready-to-eat foods are particularly vulnerable.

Effective control of microbiological hazards requires strict temperature management (keeping cold foods below 5°C and hot foods above 60°C), proper hand washing, sanitation of equipment and surfaces, and safe water use. At the industrial level, systems like HACCP (discussed below) are designed specifically to identify and control such biological hazards throughout the production chain.

Pesticide residues 🔗

Pesticides – including insecticides, herbicides, and fungicides – are essential tools in modern agriculture for protecting crops from pests and diseases. However, when these chemicals are not applied correctly or when post-harvest intervals are not followed, harmful residues can remain on food.

The Environmental Working Group’s (EWG) 2025 Shopper’s Guide found that over 75% of conventionally grown fruits and vegetables in the U.S. had detectable pesticide residues after being washed and prepared. A total of 265 different pesticides and their breakdown products were detected across 47 types of produce tested. Green beans, spinach, peppers, and kale were among the most contaminated items.

One of the challenges in managing pesticide risks globally is the lack of harmonised maximum residue limits (MRLs) across countries. A pesticide banned in the EU may still be widely used in parts of Asia, Africa, or Latin America. For example, chlorpyrifos – banned in the EU since 2020 – continues to be applied in several countries. The FAO/WHO Joint Meeting on Pesticide Residues (JMPR) works to set internationally acceptable MRLs through the Codex Alimentarius, but adoption remains voluntary.

Environmental pollutants 🔗

Beyond intentional chemicals like additives and pesticides, food can also be contaminated with environmental pollutants – substances that enter the food supply from soil, water, and air. Key pollutants include heavy metals (lead, cadmium, mercury, arsenic), persistent organic pollutants (dioxins, polychlorinated biphenyls), microplastics, and per- and polyfluoroalkyl substances (PFAS).

Heavy metals accumulate in the food chain and can damage the nervous system, kidneys, and other organs even at low levels of chronic exposure. Sources include industrial emissions, phosphate fertilisers, mining runoff, and aging water infrastructure. PFAS, sometimes called “forever chemicals,” have become a growing concern; in 2025, Japan established PFAS standards specifically for mineral water.

Controlling environmental pollutants in food requires action across sectors – from industrial emission standards and agricultural practices to food monitoring programmes and water treatment. Unlike microbiological risks, pollutant contamination is often invisible and accumulates over time, making long-term surveillance essential.

Managing food safety: GMP and HACCP 🔗

Addressing the food safety issues described above requires systematic, science-based approaches at every level of the food production chain. Two frameworks form the backbone of modern food safety management: Good Manufacturing Practices (GMP) and Hazard Analysis and Critical Control Points (HACCP).

Good Manufacturing Practices (GMP) 🔗

GMP is a set of guidelines that establish baseline conditions for safe food production. These practices cover a wide range of operational areas including facility design, equipment sanitation, personal hygiene, water quality, pest control, employee training, and record-keeping.

According to the U.S. FDA’s HACCP guidelines, GMP serves as a prerequisite programme – the foundational layer upon which more targeted food safety systems like HACCP are built. Without proper GMP, even the best HACCP plan will fail because the basic conditions for safe production are not in place.

Key GMP requirements include: ensuring that facilities are designed to prevent cross-contamination; maintaining equipment through regular cleaning and calibration schedules; implementing documented personal hygiene protocols for all workers; using only safe, quality-controlled raw materials; and maintaining thorough records for traceability.

Hazard Analysis and Critical Control Points (HACCP) 🔗

HACCP takes food safety a step further by providing a systematic, science-based approach to identifying, evaluating, and controlling specific hazards – whether biological, chemical, or physical – at every stage of the food production process. Unlike end-product testing, HACCP is preventive: it aims to stop problems before they occur.

The system is built on seven core principles:

Principle 1 – Conduct a hazard analysis: Identify all potential biological, chemical, and physical hazards associated with each step of your food production process. For instance, in a dairy plant, potential hazards might include pathogenic bacteria in raw milk, cleaning chemical residues, and metal fragments from equipment.

Principle 2 – Determine Critical Control Points (CCPs): Identify the specific steps where hazards can be prevented, eliminated, or reduced to safe levels. Pasteurisation in dairy processing is a classic CCP example.

Principle 3 – Establish critical limits: Set measurable boundaries (such as minimum temperature and time for pasteurisation) that must be met at each CCP.

Principle 4 – Establish monitoring procedures: Define how and how often each CCP will be checked to ensure critical limits are consistently met.

Principle 5 – Establish corrective actions: Specify what steps to take when monitoring reveals that a CCP has deviated from its critical limit.

Principle 6 – Establish verification procedures: Confirm through audits, testing, and review that the HACCP system is working as intended.

Principle 7 – Establish record-keeping and documentation: Maintain detailed records of all monitoring, corrective actions, and verification activities for accountability and traceability.

HACCP is recognised internationally and is mandated or recommended by regulatory bodies in most countries. The NSF International describes it as the internationally accepted risk-based system for managing food safety throughout the entire food supply chain.

How GMP and HACCP work together 🔗

GMP and HACCP are not competing systems – they are complementary layers of protection. GMP creates the clean, controlled environment that food production requires. HACCP then operates within that environment to target specific hazards with scientific precision.

Think of it this way: GMP ensures the factory floor is clean, the workers wash their hands, and the equipment is properly maintained. HACCP then asks, “At which specific steps could something go wrong, and how do we prevent it?” Together, they form a multi-layered defence system. If one layer is compromised, the other continues to provide protection.

Many international food safety standards, including ISO 22000, BRCGS, IFS, and FSSC 22000, integrate both GMP and HACCP principles into their certification requirements. This integration ensures that food businesses maintain consistent safety standards across their operations, from raw material sourcing to finished product distribution.

The role of regulation and consumer awareness 🔗

Effective food safety depends on robust regulatory frameworks. Globally, organisations like the WHO, FAO, and the Codex Alimentarius Commission set standards and guidelines. At the national level, agencies such as the FDA and USDA in the United States, FSSAI in India, and EFSA in the European Union enforce compliance through inspections, monitoring, and enforcement actions.

However, regulation alone is not enough. Consumer awareness plays a critical role. Simple habits – washing produce thoroughly, cooking meat to safe temperatures, storing perishables correctly, and checking food labels – significantly reduce the risk of foodborne illness. Purchasing from regulated and certified suppliers, understanding food labels, and staying informed about recalls are also important steps.

For the food industry, the message is clear: investing in food safety is not just a regulatory obligation. It builds consumer trust, reduces the cost of recalls and liability, and ultimately protects public health.

Looking ahead: emerging challenges 🔗

Food safety is a constantly evolving field. Climate change is altering pest patterns and increasing the risk of mycotoxin contamination in crops. Globalised supply chains mean a contamination event in one country can quickly affect consumers across the world. The rise of ultra-processed foods introduces new questions about cumulative chemical exposure from packaging and processing. And antimicrobial resistance continues to grow, driven in part by antibiotic use in agriculture.

Addressing these challenges requires continued investment in research, surveillance, and international cooperation. It also requires updating regulatory frameworks to reflect the latest science – something that agencies in Europe, the U.S., and Asia are actively working on, though progress is uneven.

What do you think? How much attention do you pay to the food safety practices behind the products you buy? And do you think consumers should have more access to information about how their food is produced and processed?

References

1. https://www.who.int/news-room/fact-sheets/detail/food-safety
2. https://pmc.ncbi.nlm.nih.gov/articles/PMC12442484/
3. https://www.fda.gov/food/food-ingredients-packaging/food-additives-petitions
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC12190098/
5. https://www.who.int/news/item/07-11-2017-stop-using-antibiotics-in-healthy-animals-to-prevent-the-spread-of-antibiotic-resistance
6. https://www.fda.gov/animal-veterinary/safety-health/antimicrobial-resistance
7. https://www.epa.gov/radtown/food-irradiation
8. https://www.iaea.org/newscenter/news/food-irradiation-combating-bacteria-around-world
9. https://www.ewg.org/foodnews/summary.php
10. https://link.springer.com/article/10.1007/s44279-024-00141-z
11. https://pmc.ncbi.nlm.nih.gov/articles/PMC12664818/
12. https://www.fda.gov/food/hazard-analysis-critical-control-point-haccp/haccp-principles-application-guidelines
13. https://www.nsf.org/food-beverage/haccp-gmp
14. https://bmcertification.com/haccp-and-gmp-pillars-of-food-safety-and-quality/
15. https://www.fssai.gov.in/