 Hyposmia is also an early and almost universal finding in Alzheimer's disease and dementia with Lewy bodies.Lifelong hyposmia could be caused by Kallmann syndrome or Autistic Spectrum Disorder.The National Health and Nutrition Examination Survey (NHANES) collected data on chemosensory function (taste and smell) in a nationally-representative sample of US civilian, non-institutionalized persons in 2012.