Researchers in the UK have suggested that earwax may help diagnose mental disorders. It can measure the content of the so-called stress hormone cortisol.
"Popular Mechanics" writes briefly about the research. Scientists conducted an experiment with 37 volunteers. They found that the accumulation of cortisol can be measured by the secretions in the ear canal. The researchers thought it could help create new ways to diagnose mental disorders, including depression.
The main author of the work was interested in finding an alternative method for measuring the level of cortisol in the body without taking a blood test. After all, the process of blood sampling itself can be stressful for someone, and therefore reduce accuracy. Earlier, the scientist found that the level of the hormone can be measured by hair, and now he found out that by earwax. The author of the work specifies that more research is needed in this area.
It is worth noting that the experiment was conducted with too few people.