Chemical analysis of 2,000-year-old human teeth from northern Vietnam has confirmed that ancient inhabitants deliberately ...
The discovery presents some of the oldest physical evidence that tooth-blackening trends in Vietnam have stayed consistent for a very, very long time.
In a study of 2,000-year-old skulls from Vietnam, archaeologists discovered that iron was the primary component that dyed teeth black.
The ancient Southeast Asian practice of tooth blackening was once thought to have emerged ...
Pediatrician Dr. Pawan Madaviya warns parents against giving iron drops directly to children, as this can cause black stains on teeth and tongue. He advises mixing the drops with citric juice like ...