"Forever chemicals", known as PFAS or per- and polyfluoroalkyl substances, are a family of synthetic chemicals that take an extremely long time to break down.

Chronic exposure to even low levels of the chemicals has been linked to liver damage, high cholesterol, reduced immune responses, low birth weights and several kinds of cancer.

Ministers from 18 countries, including France, Germany and the Netherlands, pricked their fingers at the informal meeting in Aalborg to raise awareness about PFAS pollution, according to the European Environmental Bureau.

The blood samples will be tested for 13 PFAS substances, with the results due after the summer.

Denmark, Germany, the Netherlands, Norway and Sweden have submitted a joint proposal to the European Commission to ban the production, sale, and use of almost all PFAS.

"It is crucial that we now take strong action against PFAS pollution, which is why measures must be taken across the EU to prevent, contain, and clean up PFAS," Danish Environment Minister Magnus Heunicke said in a statement.