EFSA warns that undercooked beans can pose a preventable health risk

EFSA says raw or undercooked beans can create a preventable food-safety risk. The practical answer is specific: soak raw dried beans in water for 6 to 12 hours, change the water, then boil them for at least 30 minutes at 100°C and continue cooking until they are soft. That is the consumer-facing message behind a new assessment from the European Food Safety Authority.

Published on January 28, 2026, the announcement responds to a request from the European Commission. EFSA examined foodborne illness linked to raw or undercooked pulses in the context of growing interest in plant-based diets that use foods raw or only minimally cooked. The assessment is relevant to home cooks because the final safety step happens in the kitchen: preparation determines whether naturally occurring lectins remain active.

Lectins are proteins found naturally in many plants, including legumes, grains and vegetables. Most are harmless. EFSA focused on phytohaemagglutinin, or PHA, a lectin found in beans and described by the authority as the most toxic lectin in commonly eaten edible plants. Raw or undercooked pulses containing active lectins have been linked with nausea, vomiting, abdominal pain and diarrhoea.

What EFSA found

The assessment created an acute-exposure scenario in which beans were not cooked enough and half of the lectins remained active. EFSA concluded that this scenario represents a health concern for all age groups. The authority also makes the important boundary clear: properly processed and prepared pulses do not pose a lectin-related risk. The finding is therefore about inadequate preparation, not a warning to avoid beans or plant-based food.

EFSA’s conclusion combines exposure modelling with toxicological evidence, including animal studies. It is a risk assessment, not a test of a particular brand, recipe or appliance. The announcement does not name a product, batch or retailer, and it does not replace the cooking instructions printed on a food package.

The verified kitchen method

For raw dried beans, EFSA’s own consumer advice can be turned into a short checklist:

Soak. Cover the beans with water and leave them for 6 to 12 hours, until they soften.
Change the water. Drain the soaking water and replace it before the boil.
Boil. Bring the beans to 100°C and boil for at least 30 minutes.
Finish the cooking. Continue until the beans are soft, because cooking time varies with the pulse and the method.

The sequence matters. EFSA says steaming, microwaving and roasting are less effective than soaking followed by boiling for reducing the majority of lectins in pulses. A short heating step that leaves beans firm should not be treated as an equivalent safety method. When a package gives a longer or more specific instruction for a particular variety, follow that instruction and use tenderness as a check rather than guessing from appearance alone.

What this means for everyday cooking

The advice is easiest to apply when beans are planned as an ingredient rather than an impulse meal. Start the soak the evening before, replace the water in the morning and allow enough time for a proper boil. That small change in routine is more reliable than trying to rescue a batch with a quick microwave or a brief roast. It also makes it easier to cook a larger quantity safely and use it in several meals.

Do not taste beans while they are still raw or undercooked. Keep the cooking water and utensils under control, wash hands and surfaces after handling raw ingredients, and store cooked food promptly according to the package or local food-safety guidance. Those are ordinary kitchen precautions; they do not shorten the boiling step recommended by EFSA.

A narrow warning with a useful fix

EFSA’s announcement is not a product recall and does not say that beans are unsafe when properly processed. It identifies a specific hazard created when lectin-containing pulses are eaten raw or insufficiently cooked, then gives consumers a method they can verify at home. The European Commission and EU Member States will consider further measures to inform and protect consumers, while EFSA also points to gaps in data on different lectins and their effects.

For cooks, the takeaway is simple: dried beans are not a shortcut ingredient. Soak them, change the water, boil them thoroughly and cook them until tender. Read the full EFSA announcement and its plain-language summary when you need the underlying evidence or the limits of the assessment.