The UK Health Security Agency launches the nation's first study to measure toxic PFAS forever chemicals in blood samples from British residents.

The British government has launched a nationwide study to measure per‑ and polyfluoroalkyl substances, commonly known as PFAS, in the bodies of UK residents.

The survey, coordinated by the UK Health Security Agency, will collect blood samples and lifestyle information from a representative cross‑section of adults. Researchers will analyse the data to determine how widely PFAS are present and what health risks may be associated with exposure.

PFAS are a class of synthetic chemicals used in products such as non‑stick cookware, water‑repellent clothing and firefighting foam. Because they do not break down easily, they persist in the environment and have been detected in water, soil and food supplies.

A government spokesperson said the study will provide the evidence needed to shape future regulatory action and protect public health. "Understanding the extent of PFAS exposure across the population is a critical step," the spokesperson added.

Study design and timeline

Participants will be recruited through general practitioners and community health centres. After giving informed consent, each volunteer will provide a blood sample and answer a questionnaire about diet, occupation and use of consumer products that may contain PFAS.

The agency expects the data‑collection phase to run for several months, with preliminary results released early next year. Final findings will be published in a peer‑reviewed journal and shared with policymakers.

Public health context

International research has linked high PFAS concentrations to immune system effects, thyroid disruption and an increased risk of certain cancers. The UK has already imposed limits on PFAS in food contact materials, but comprehensive exposure data remain scarce.

Health experts said the new study could fill that gap and guide more targeted interventions. "Accurate exposure data allow us to assess risk and prioritize actions," said a senior epidemiologist at a leading university.

The initiative marks the first systematic effort in the UK to quantify PFAS levels in the general population. Officials expect the results to shape future chemical‑safety regulations and public‑health advisories.