Human body odour can unconsciously reveal a person's political beliefs, emotional state and illnesses, according to scientific studies reviewed by the Indian Defence Review.
The human body continuously releases chemical molecules through sweat, tears and breath. These airborne compounds include emotional chemosignals that transmit information about feelings, triggering responses in the human brain even when an individual remains completely unaware of any distinct scent.
Pamela Dalton, a researcher at the Monell Chemical Senses Center in Philadelphia, explained that this biological communication occurs primarily without conscious awareness. She noted that these invisible chemical cues can alter the mood, perception and physical reactions of people nearby.
The Monell Chemical Senses Center is an independent non-profit scientific institute established in Philadelphia to conduct fundamental research into the biological mechanisms of smell and taste.
Political scent preferences and disease detection
Researchers have also discovered direct links between olfactory signals and political ideology. A 2014 study published in the American Journal of Political Science found that test participants showed a clear preference for the body scent of individuals who shared their own political convictions, despite never seeing the people whose odours they evaluated.
Another branch of scent research focuses on the medical identification of illnesses. The publication highlighted Joy Milne, a woman with an extraordinarily acute sense of smell who can detect distinct odours associated with several medical conditions.
During a 2019 experiment involving t-shirts worn by Parkinson's disease patients and healthy participants, Milne accurately identified almost every sample. In one notable instance, she categorized a shirt from a seemingly healthy participant as carrying the illness, and that individual was subsequently diagnosed with Parkinson's disease.
Nicholas Christakis, a sociologist at Yale University, suggested that such biological mechanisms developed as an evolutionary adaptation to help human groups warn one another of impending threats. Christakis explained that for social animals, communicating fear to group members provided an obvious survival benefit.
Epilepsy gene therapy and women's sleep needs
The findings follow other medical developments reported by the Ukrainian news agency UNIAN, including an experimental gene therapy designed to treat severe epilepsy. Scientists developed a technique in which a modified virus delivers a corrective gene directly into the damaged region of the brain, reducing seizure frequency by more than 90 percent in three patients with drug-resistant epilepsy.
UNIAN also highlighted research showing that women experience sharper negative effects from sleep deprivation than men. Health experts noted that poor sleep among women is more frequently linked to stress, depression, irritability and general health complications, suggesting that women may require approximately 20 minutes more sleep each night because of their brain workload.
