Palta P, et al. - The proposition explored by researchers was that poor sense of smell was related to lower cognitive function and higher mild cognitive impairment (MCI) prevalence in old age, wherein olfaction categorized as the olfactory impairment (OI) was estimated by the Sniffin' Sticks test. Lower mean factor scores, in terms of memory, language, executive function/processing speed, and general cognitive performance were discovered among subjects with OI. Furthermore, OI appeared to be correlated with MCI. Yielded data indicated that an impaired sense of smell possibly presented as a readily accessible early marker of neurodegeneration and could improve upon the prevailing delayed diagnoses and underascertainment of MCI/dementia.