From fresh fruits and vegetables to milk, fish, meats and cupboard staples such as chopped tomatoes, beans and flour, eating organic has never been easier. Organic foods are produced under strict farming standards that limit the use of harmful chemicals and pesticides—substances used to kill, repel or control pests on certain foods during production. It also focuses more heavily on animal welfare, with livestock fed organically grown food, given more access to roam outdoor space rather than being caged or kept mostly indoors, and raised with tighter restrictions on antibiotic use.
Why Pesticides May Make It Worth Buying Organic
Chemical pesticides are applied to crops to battle weeds, insects and fungi that can harm food growth. While these invisible and tasteless substances are important in protecting foods, some pesticides can pose risks to human health if exposure levels are too high. Research suggests that just under half of traditional farmers and agricultural workers worldwide experience pesticide poisoning each year due to frequent exposure. Around 90 per cent of organic farmers certified by the Soil Association use no pesticides at all, while others use between 15 and 30, compared to hundreds used in conventional farming.
Studies have found that some pesticides can be acutely toxic, causing harmful or potentially fatal effects within 48 hours of exposure. Symptoms of acute pesticide poisoning include sore throat, coughing, skin and eye irritation, allergic reactions, nausea, vomiting, diarrhoea and headaches. In severe cases, exposure can lead to extreme weakness, loss of consciousness, seizures and death. For consumers, the World Health Organisation states that pesticide exposure is significantly lower, but previous studies have found that 44 per cent of European food tested positive for pesticides. This is concerning because ingesting high levels of the chemicals has been linked to diseases such as cancer. However, the level of pesticides found on food is regulated in the UK by the Health and Safety Executive, and the Food Standards Agency recommends washing fruit and vegetables before eating to remove bacteria, soil and pesticide residue.
Which Foods May Be Worth Buying Organic
Pesticide Action Network UK analysed official government data to reveal the "Dirty Dozen"—foods in the UK with the greatest volume of pesticide residues. Leading the list was grapefruit, with 99 per cent of the fruit containing multiple pesticide residues. Behind this were grapes (90 per cent), limes (79 per cent), bananas (67 per cent), peppers (49 per cent), melons (46 per cent), beans (38 per cent), chilli peppers (38 per cent), mushrooms (31 per cent), broccoli (26 per cent), aubergines (23 per cent) and dried beans (21 per cent). Nichola Ludlam-Raine, a specialist dietitian, advises: "If you're shopping on a budget, I'd suggest prioritising organic options for foods that tend to have higher pesticide residues when eaten with the skin on, such as aubergines, mushrooms, and peppers, or simply thoroughly washing them beforehand."
Which Foods You Don't Need to Buy Organic
The "Clean Fifteen" lists foods with the lowest pesticide residues. In a 2019 report, beetroot, corn on the cob, mushrooms, figs, rhubarb, swede and turnip all had 0 per cent of samples containing pesticide residues. Behind them were onions (1 per cent), avocado (2 per cent), cauliflower (3 per cent), radish (4 per cent), sweet potatoes (6 per cent), as well as broad beans, leeks, pumpkin and squash (all 8 per cent). Experts say the benefits of buying these organically may be minimal. Ludlam-Raine adds: "For foods with thick protective skins or peelings, such as avocados and onions, the benefits of buying organic are likely to be much smaller."
Why Buying Organic Meat and Dairy May Give You a Health Boost
Organic farm animals generally live better lives than those on intensive factory farms. Some studies suggest organic milk and meat may contain higher levels of omega-3 fats due to organic farm animals eating more nutritious diets. Omega-3 is important for heart health and reduces the risk of heart attack and stroke. Ludlam-Raine says: "If budget allows, some people may choose organic meat and dairy for animal welfare or environmental reasons, but from a nutritional perspective, I'd be more focused on choosing lean cuts of meat, plus oily fish, and consuming a balanced diet overall." Lee Holdstock of the Soil Association adds that organic fruit and vegetables have higher levels of polyphenolic compounds (antioxidants and anti-inflammatories), and organic meat and milk have better fatty acid profiles.
Why the Benefits of Organic May Not Be Worth the Cost
Not all experts agree organic equals better. Professor Gunter Kuhnle of the University of Reading argues that those who can afford organic food are likely to be naturally healthier. He says: "Just for healthiness, I don't think organic food is really worth the extra cost." He understands choosing organic for better livestock conditions or to avoid intense agriculture, but notes organic agriculture needs more space. Regarding pesticides, he says the volume used is "so low that it won't cause any harm to health," though recalls can occur if mistakes are made. Ludlam-Raine concludes: "For most people, the biggest health benefit comes from eating more fruit and vegetables overall, rather than worrying about whether they're organic. Given that most adults in the UK still struggle to eat their five-a-day, I'd much rather see someone eating conventionally grown strawberries, apples and broccoli than avoiding them altogether because organic options are too expensive."
