The lives of the people in the interior revolved around reindeer, their main source of food. They also used all the parts of its body to make sewing materials and clothing, tools and weapons. The meat was mostly eaten roasted and the blood, marrow and milk were drunk or eaten raw. The liver, heart, kidneys and tongue were considered delicacies. Salmon and other freshwater fish as well as berries and roots played a major part in the diet, as reindeer flesh did not contain some necessary vitamins and minerals, nor dietary fibre, needed to survive in the harsh tundra.