Once the hair stops growing, the hair follicle goes through big changes in its structure and goes into a time of rest. In this process, melanocytes die on their own.
But at the beginning of the next hair growth cycle, the melanocyte stem cells make a new set of melanocytes in the hair shaft. Wellhealthorganic.Com/Know-The-Causes-Of-White-Hair-And-Easy-Ways-To-Prevent-It-Naturally
When new hair grows, these melanocytes make sure that there is coloration. But when the melanocytes are destroyed, or not there, the hair that grows has no color and can look gray or white.
Damaged Hair Grows Back.
Research from a reliable source has shown that free radicals cause more damage to cells in the hair shafts of people whose hair is gray or white. There are no melanocytes or melanocyte stem cells in these sites.
When the DNA of melanocyte stem cells in a mouse’s hair follicle was broken, a rusted Source caused lasting damage to the cells. Then, these stem cells couldn’t make more of themselves.
If there isn’t a pool of stem cells, the next round of hair growth happens without melanocytes, which makes hair turn gray.
Even though it hasn’t been possible to fully figure out what causes hair to turn gray in people, damage to melanocyte stem cells over time likely leads to losing these cells. Each hair cell will stop being able to make colored hair in the long run.
So, even though we will all lose our hair color at some point, why do some people go gray in their 20s while others lose their color in their 50s? In 2016, scientists found that people with a certain version of the interferon regulatory factor 4 gene tend to get gray hairs sooner.
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