Why does white hair tend to turn yellow? How can you avoid this inconvenience?
It's a common fear for people with white hair, as well as those with very blond hair. It can sometimes happen that hair acquires strange tones or turns yellow.
Hair color is determined by melanin. In fact, it’s composed of 2 pigments that generate different colors. Pheomelanin is the source of colors ranging from yellow to red. Meanwhile, the spectrum of eumelanin ranges from brown to black.
Asians have very black hair, because it is composed almost exclusively of eumelanin. In contrast, red hair contains more pheomelanin.
We know that aging induces a decrease in melanin production. And it’s pheomelanin that often becomes predominant for brown hair. This is why the color is dominant in shades of yellow on white hair.