There is no surer sign of aging than finding new gray hair. Scientists identified the gene responsible for the graying process. What does it mean and how does your hair actually turn gray? Look and weep. Recently, geneticists have examined the DNA of more than 6,000 people and have identified specific genes that affect things like baldness, beard thickness, curly hair, and even fuzzy eyebrows … But the discovery that drew the most attention was that there was some variation in the IRF4 gene affect when our hair starts to turn gray. Finding this specific variation causing graying could help scientists create products that slow the graying process. Or accelerating, if you want to be a silver fox or an avant-garde hipster. But we all really start graying, in a way.
Before your hair jumps out of the scalp, they are completely white. They get their color thanks to chemistry – the presence of pigment molecules from the melanin group, which also determine your skin tone and eye color. In the hair is eumelanin, which creates dark shades and pheomelanin, which creates lighter shades of hair. Share of these The two substances determine the color of your hair, your hair – and the hair of everyone else. How this color gets into your colorless hair at the beginning depends on the follicles. Every hair follicle In the skin it contains cells called melanocytes that produce melanin. How Hair Grows In follicle, melanocytes push melanin pigment into hair cells that contain keratin, a protein that is also in the skin and nails.
So as your hair grows out of your head, so is stained with its natural color. Over time, our melanocytes produce less pigment, so ours the hair starts to light as we age. Scientists have recently discovered that as we age, our hair follicles begin to accumulate hydrogen peroxide – the same substance that people use to bleach their hair. Small amount of hydrogen peroxide is natural. In fact, we create our own H2O2 because melanocytes stain our hair. Enzymes, especially catalase, decompose hydrogen peroxide and keep its concentration in equilibrium This equilibrium decides when older follicles cannot produce enough catalase. Higher concentration hydrogen peroxide attacks tyrosinase, an important enzyme in the production of melanin.
No melanin, no hair color. If you haven’t found the gray, you can find it at about the same age as your parents. But what about factors beyond age and genetics? A recent study suggests smoking may lead to premature onset of graying. People still say stress brings gray, that? Just look at how gray presidents are when they are in office. Some researchers He claims that emotional stress can accelerate the so-called oxidative stress, that is, the damage caused reactive oxygen radicals such as hydrogen peroxide.
But others argue that there is no sound scientific evidence. I think you can put all these hypotheses in the gray zone. In any case, it probably doesn’t need to be stressed, don’t worry about graying anyway. It’s totally natural and you can be cool. Share a photo of your favorite celebrity with gray hair or own family silver in the comments. The Gang The Speaking of Chemistry needs ideas. Special thanks to Jerry Weissmann, Professor Emeritus at New York University School of Medicine for your help with this video. Share this video and remember subscribe to our channel.
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