HUNT3 (2006-2008) collected information among residents in Nord-Trøndelag who were 13 and older. The collected material is used in medical and social science research. HUNT3 was also a simple health check for each participant.

Clinical observations and interviews were done with each participant, as well as numerous additional studies.
All the measurement data and self-report data is stored in HUNT Databank.

Biological material collected in HUNT3 includes blood of adults, urine sample from a selected group and DNA of youth. The collecting of biological material has been the biggest investment made in HUNT3, and is stored in  HUNT Biobank.