The practice of using X-Ray fluorescence analysis as a method in ar-chaeological, forensic and osteological studies have resulted in a vast amount of data. It is time and cost efficient, and the method of µXRF element analysis has been of great use to archaeologists, forensic an-thropologists and osteologists to understand dietary customs, techno-logical trade patterns, understanding of diagenesis, elemental accumu-lation in bone and more. Moreover, the method has been crucial due to its non-destructive nature since bones and ancient artifacts are fragile and thus a nonde-structive method is preferable. This essay will give the reader an intro-duction to the basics of micro X-Ray fluorescence analysis and will explore the possibilities of trace elements in right (dexter) and left (sinister) thighbones (femur) on a medieval population in Visby Got-land, namely Sankt Hans. The reader will also come to know the fun-damental principles, applications, strengths and weaknesses of mi-croX-Ray fluorescence, as well as its limitations. Keywords: µXRF, non-destructive, data, method, left, right, thigh-bone, elements, analysis.