People with a reduced sense of smell had more than twice the risk of frailty than those with a normal one, according to an analysis of 10 studies published in JAMA Otolaryngology—Head & Neck Surgery. The analysis defined frailty as a decline in a person’s physiological functioning that makes them more susceptible to stressors. It included studies involving a total of more than 10 600 participants with a mean age of about 63 years.
