Marine biologists use earwax to determine all kinds of things about whales, and the same techniques might be useful for learning about people. Just like oak tree rings tell you how old a tree is, it turns out earwax contains a wealth of information!
Scientists can tell how old the whale is, what parts of the ocean it lived in, and when it lived there. They can also know how old it was when it went through puberty, and in the case of female whales, how many times it had babies. Earwax even indicates whether the whale spent time in polluted waters by how many toxic chemicals have built up in the wax.
You might be wondering, what could your earwax tell others about you? Let’s find out.
It’s in Your Genes
Researchers have found that you have a gene that determines what texture your earwax will be. This gene gets passed from parent to child, just like the color of your eyes or the shape of your face. Some people have dry wax. Some people have wet wax. For some, it’s nearly odorless. Others have a distinct scent. Some have wax that’s yellow, and others clear.
It’s all in the genes that make you who you are.
Who Your Ancestors Were
No, it cannot give you your whole family tree, but because earwax type is passed down to you, it can tell you which continent your ancestors likely came from.
People from East Asia tend to have dry, colorless, and nearly odorless earwax. Native Americans also have this kind of wax, which reinforces the idea that Native Americans may have come to the “New World” on a land bridge from Asia.
People whose families come primarily from Europe and Africa have wax that is wet and yellowish-brown. Their wax has a distinct scent that is not present in Asia. The earwax of people in Southeast Asia and Western Asia (Middle East) is still being studied.
While these are the general rules, there are obviously exceptions that likely occurred when people migrated to different parts of the world. Your earwax could also be different based on your lifestyle.
Your Body Odor Type
The type of earwax you have is closely tied to your body odor.
People with dry earwax have more eccrine sweat glands. These sweat glands sweat out mostly water and salt. This sweat doesn’t smell like anything.
People with wet wax have more apocrine sweat glands. These glands sweat out excess protein and fat. In addition to the actual odor of sweat, bacteria consider this kind of perspiration food. These happy bacteria multiply to produce what we call body odor.
Your Health History
In addition to telling you about your ancestry, it can give clues about your health. Researchers have been able to link wet earwax with a higher risk of breast cancer. Earwax also stores a record of varying hormone levels. Various life events cause an increase in hormone release, such as:
- A very stressful event
- Menstrual cycles
Just like whales, you also store dead viruses, pollutants, and other chemicals you’ve produced or been exposed to in your earwax. Each of these tells a story about where you’ve been and what you’ve been through.
Earwax science is still young, so researchers have much more to explore. What else will they learn about the secrets that earwax might hold? We’ll continue to follow this exciting research and know you will too.