The first episode looks at Mitochondrial DNA research into mental disorders, and how it has helped scientists understand the origin and biological ancestry of the Danish population. The Danish National Biobank is a treasury of science for international health research. It contains 10 million biosamples across an array of diagnostic categories, as well as the Danish Biobank Register that links over 25 million biosamples in Danish biobanks to vast amounts of register information. This podcast will give an insight into some of the amazing research done through the Danish National Biobank and hopefully inspire researchers to utilize this potential in the future.