I Energy, evolution and medicine 1 Energy and the body.- 2 Evolutionary medicine.- 3 The brain and the immune system - two competing realms.- II Energy expenditure in the spotlight 4 Inflammation and energy.- 5 Pain and energy.- 6 Psychological stress and energy.- 7 Other energy-draining situations.- 8 What does increased energy expenditure mean for the body.- III From energy and evolution to symp...