If You Have Dry Earwax — DNA Finally Revealed Where It Really Comes From

What if something as ordinary as earwax could reveal a hidden story written in your DNA? This video explores the genetics behind dry and wet earwax and the discovery of the ABCC11 gene, a single genetic variation that can determine whether earwax is dry and flaky or wet and sticky. We trace how scientists identified the key 538 G-to-A variant on chromosome 16 and why this tiny change can have surprisingly visible effects. The story goes far beyond earwax. The ABCC11 variant is also connected to the chemistry behind underarm body odor, making one genetic change responsible for multiple traits. We explore how the variant became especially common in Northeast and East Asia, the evidence suggesting natural selection, the proposed connection to cold-climate adaptation, and why scientists still debate the exact reason this mutation became so widespread. Most remarkably, researchers can use ancient DNA to investigate this trait in people who lived thousands of years ago. From the Jomon, Epi-Jomon, and Okhotsk peoples of ancient Japan to the broader history of human migration and population mixing, dry earwax becomes a small but powerful genetic clue. The deeper mystery remains: why did this single DNA variant spread so successfully? #DryEarwax #ABCC11 #earwax #dna #genetics #ancientdna #humanevolution