The study of thiamine deficiency earned its author the Nobel Prize (Eijkman 1929). The research connected with vitamin C was likewise awarded this prestigious prize (Haworth and Szent-Gyorgyi, 1937). Below we briefly discuss several selected hypovitaminoses that may pose problems in clinical practice. Certain chapters (e.g. folic acid deficiency, iodine deficiency, …) were not completed on time for this CD and will be incorporated in an updated version at a later date.