https://www.foxnews.com/health/attractive-people-have-better-immune-systems-study-saysThere are associations between facial attractiveness and immune function, according to researchers.
In a study published Wednesday in the academic journal Proceedings of the Royal Society B, a team from Texas Christian University looked at 159 participants who were students at the university or members of the surrounding community.
The men and women were screened in advance to ensure that they were without a history of mental illness or chronic depression, non-obese, free from acute illnesses, not using hormonal contraceptives, willing to abstain from steroidal and anti-inflammatory medications, exercise and alcohol consumption for two days prior to participation and willing to fast the morning of participation.
All women subjects participated when their sex steroid levels are low during the early follicular phase of their ovulatory cycle and participants were asked to have their photos taken and blood tested.
They also responded to compliance questions on the day of participation and removed any make-up before taking a picture from the neck up. They were instructed to maintain a neutral facial expression.
An attractive young woman
Then, their height and weight were measured and 85 milliliters of blood was collected, as well as plasma that was frozen at minus 80 degrees Celsius.
A separate tube of whole blood was taken for hematology – the study of blood and blood disorders
Results revealed that attractive targets had higher rates of phagocytosis – where a cell uses its plasma membrane to ingest foreign particles – of E. coli bioparticles, higher basophil white blood cell counts, lower neutrophil white blood cell counts, greater natural killer cell cytotoxicity and slower rates of Staphylococcus aureus growth in plasma. The effect was stronger in women than in men.
Literature, the authors wrote, revealed that facial attractiveness is "often consistent across time and space."
"Features such as clear skin, prominent cheekbones, bright eyes and full, red lips have been deemed attractive throughout recorded human history," they noted, writing that perceptions of attractiveness could "play an important role in guiding the choice of partners with high-functioning immune systems."