Food and nutrition

Ciguatera is a type of food poisoning due to consumption of tropical fish contaminated with marine toxins known as ciguatoxins. It causes digestive, skin, cardiovascular and neurological disorders, which can sometimes persist for several weeks or even months. The itching observed in cases of ciguatera has given this poisoning the French name la gratte. To reinforce prevention, ANSES has drawn up a list of over 60 species of fish posing a risk of ciguatera in the French Caribbean.

Tick-borne encephalitis is a disease caused by a virus transmitted by certain ticks. It is of growing concern in France. Since 2020, cases associated with the consumption of raw-milk products have been reported, whereas this mode of transmission had not previously been observed in mainland France. In parallel with this situation, the geographical range of the virus and the number of cases in Europe – all routes of transmission combined – are increasing. Although infections remain relatively uncommon in France, the health consequences can be serious, potentially leading to long-term sequelae. This led ANSES to investigate the issue in order to review knowledge of the virus and the risks of transmission and consider the risk management measures that could be put into place.

From food production to consumption, ANSES provides scientific expertise to ensure that food is as safe as possible. This includes developing analytical methods, conducting studies on the safety of novel foods, and monitoring food poisoning incidents. On World Food Safety Day, discover seven concrete actions taken by our scientists to protect consumer health.

Microplastics are present in all beverages, but those packaged in glass bottles contain more microplastic particles than those in plastic bottles, cartons or cans. This was the surprising finding of a study conducted by the Boulogne-sur-Mer unit of the ANSES Laboratory for Food Safety. The scientists hypothesised that these plastic particles could come from the paint used on bottle caps. Water and wine are less affected than other beverages. These findings have highlighted a source of microplastics in drinks that manufacturers can easily take measures to address.

Since 2024, the number of cases of poisoning involving the consumption of cannabidiol (CBD) products has increased significantly. These products are sold in stores, in vending machines and on the Internet in the form of e-liquid for electronic cigarettes, smokable products, food supplements and foodstuffs (oils, capsules, sweets, chocolate, etc.). Most of these cases of poisoning are caused by prohibited substances (synthetic cannabinoids) contained in these products without the consumer’s knowledge, or by THC levels above 0.3%. The ANSM and ANSES are drawing attention to these risks.

Located in a livestock farming region at the heart of Brittany since 1975, the Fougères Laboratory has evolved to specialise in risks associated with veterinary medicinal products and chemical contaminants in food. Tahar Ait Ali, the Laboratory’s Director, tells us about its history and activities.

Liquorice is used as an ingredient in certain food supplements and as a flavouring in beverages and foods. Following numerous reports of adverse effects, some of them severe, ANSES assessed the risks associated with the consumption of products containing liquorice. Its expert appraisal shows that repeated high consumption of beverages and foods containing liquorice can lead to hypokalaemia (a drop in blood potassium levels) and high blood pressure, thereby increasing cardiovascular risk. Some people are particularly sensitive: pregnant or breastfeeding women, children, people with cardiovascular problems (such as hypertension), or kidney or liver problems. ANSES recommends that food labels indicate the presence of liquorice or its main active ingredient, glycyrrhizinic acid, even in small quantities.

Some forms of arsenic are toxic and even carcinogenic. ANSES’s Laboratory for Food Safety has developed an innovative method that will enable their concentration in different foods to be more accurately measured. This breakthrough will enhance the assessment of consumer exposure and health risks.

Scientists at ANSES’s Laboratory for Food Safety have reviewed the reference temperature used to calculate the use-by dates of ready-to-eat refrigerated foods. This temperature takes account of those actually observed in domestic refrigerators in 16 European countries. It was defined to prevent foodborne infections caused by pathogenic bacteria such as Listeria monocytogenes .

The isoflavones naturally found in certain plants can have harmful effects on health, particularly on the reproductive system, if consumed in excessive amounts. As soy is the main source of isoflavones, ANSES is recommending that soy-based foods not be served in mass catering establishments to avoid over-consumption. It is also calling on the agri-food sector to review soy production and processing techniques, in order to reduce isoflavone levels in foods.

ANSES is publishing two expert appraisals on vegetarian diets. In the first, it studied the health benefits and risks associated with these diets. To do this, it carried out a systematic review of the available epidemiological studies. In the second, it proposed specific dietary guidelines for people who are on or are considering adopting a vegetarian diet. The aim is to help them optimise their nutritional intake while taking account of their eating habits and limiting their exposure to contaminants.

Since late 2024, ANSES has been taking part in six new European projects, two of which it is coordinating. These projects, funded by the European Food Safety Authority (EFSA) as part of its "tailor-made" activities, are seeking to improve knowledge and the use of data on risks associated mainly with food. They will explore issues such as the risks associated with botulism, according to a One Health approach, and the use of artificial intelligence to analyse data in the field of food safety.