Earwax is roughly half fat. The rest is a mix of dead skin cells, proteins with germ-fighting properties, and a watery secretion similar to sweat. That blend creates a sticky, self-renewing barrier that protects the delicate skin of your ear canal from bacteria, fungi, and debris.
How Earwax Is Made
Two types of glands inside your ear canal work together to produce earwax. Sebaceous glands, attached to tiny hair follicles, secrete an oily substance called sebum that lubricates the skin. Ceruminous glands, which are modified sweat glands, add a thinner, watery secretion loaded with antimicrobial proteins. These two secretions combine with shed skin cells from the ear canal lining to form the substance you recognize as earwax.
Your ear canal constantly sheds its outermost layer of skin, and those dead cells get trapped in the oily mixture. The result is a complex, slightly acidic paste that coats the canal walls and slowly moves outward on its own.
The Lipid Breakdown
Lipids (fats) make up about 52% of earwax by dry weight, and the specific types matter because they’re what give earwax its texture and protective qualities. A study published in the Journal of the American Academy of Dermatology broke the fat content down precisely:
- Fatty acids: 22.7%, the largest single component, helping maintain the acidic environment that discourages bacterial growth
- Cholesterol: 20.9%, a structural fat that keeps the wax pliable
- Ceramides: 18.6%, the same type of fat found in skin barrier creams, helping seal moisture in and irritants out
- Cholesterol esters: 9.6%
- Wax esters: 9.3%, similar to the esters found in beeswax
- Squalene: 6.4%, a compound also produced by skin elsewhere on the body
- Triacylglycerols: 3.0%, a common storage fat
There’s even a small amount of fat (about 0.9%) that is chemically bonded to the non-fat portion of the wax and can’t be separated without breaking those bonds. This tightly attached layer likely helps anchor the wax to the canal surface so it doesn’t slide off too easily.
The Non-Fat Half
The remaining roughly 48% of earwax is a combination of proteins, shed skin cells (keratinocytes), and water. The proteins secreted by ceruminous glands have antimicrobial properties, meaning they actively fight off bacteria and fungi that enter the ear canal. The dead skin cells provide bulk and help trap dust, dirt, and small insects before they reach the eardrum.
Earwax also contains immunoglobulins, which are immune system molecules that tag foreign invaders for destruction. This makes earwax more than just a physical barrier. It’s a chemical defense system as well.
Why Your Earwax Looks Different From Someone Else’s
A single genetic variant in the ABCC11 gene determines whether you have wet or dry earwax. Wet earwax is amber to brown, sticky, and contains more fat. Dry earwax is flaky, light-colored, and has noticeably less fat content. People who carry two copies of the T variant of this gene produce the dry type.
The distribution is dramatic. Dry earwax appears in 80 to 95% of people of East Asian descent but in fewer than 3% of people of European or African descent. If your earwax is pale and crumbly, your genetics are the reason, not anything about your health.
What the Color Tells You
Earwax ranges from off-white and yellow to bright orange, dark orange, brown, and black. The most common shade is amber-orange to light brown. Color is primarily an indicator of age: newer wax tends to be lighter, and it darkens over time as it collects more debris and oxidizes. Children generally produce softer, lighter wax, while adults tend toward darker, firmer wax.
A blockage can also change the color and texture because the wax sits in the canal longer than usual, giving it more time to darken and harden. If you notice discharge that is runny, green, foul-smelling, or bloody, that’s not earwax. Those are signs of an infection or injury in the ear.
How Earwax Moves Out on Its Own
Your ear canal has a built-in conveyor belt. The skin lining the canal migrates outward from the eardrum toward the opening of the ear at a rate of about 0.05 to 0.07 millimeters per day, roughly the speed a fingernail grows. A systematic review in The Journal of Laryngology & Otology measured the average migration rate in a healthy ear canal at about 0.11 millimeters per day.
This slow, steady movement carries earwax, along with everything it has trapped, toward the outer ear where it eventually flakes off or falls out during jaw movements like chewing and talking. The system works continuously and doesn’t need help from cotton swabs. Inserting anything into the canal typically pushes wax deeper, working against the migration and increasing the risk of a blockage.
What Earwax Actually Protects Against
The combination of fats, acidic pH, and antimicrobial proteins in earwax creates a hostile environment for pathogens. The fatty acids help keep the ear canal slightly acidic (around pH 6.1 in wet-type earwax), which inhibits the growth of many common bacteria. The ceramides and cholesterol form a water-resistant coating that prevents the thin skin of the ear canal from becoming waterlogged and vulnerable to infection, a condition swimmers often deal with when their natural wax layer has been washed away.
Earwax also serves as a physical filter. The sticky texture catches airborne particles like dust and pollen, and the tiny hairs in the canal work alongside the wax to prevent anything from reaching the eardrum. People who aggressively remove their earwax sometimes experience more frequent ear infections because they’ve stripped away this first line of defense.