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Arrêter de se faire des cheveux blancs ?

Is it possible to stop getting gray hair?

It is normal for hair to turn white over time. However, many people believe that white hair ages the face and would like to delay its appearance as long as possible. Let's explore together if it's possible to stop the onset of white hair.

Getting white hair: is it inevitable?

The whitening of hair is a natural process that is part of life. It should be noted from the outset that most factors contributing to the appearance of white hair are not modifiable. This can be attributed to the decrease in activity and number of melanocytes over time. These cells are responsible for the production of melanin, a pigment that, after its synthesis, is transferred to the keratinocytes surrounding the hair bulbs, giving them their color.

Another factor that we have no control over is genetics. Several studies have established a link between the activity of certain genes and transcription factors, such as the MC1R gene (MelanCortin 1 Receptor) and the microphthalmia-associated transcription factor (MITF), and the early onset of white hair.

However, it is important to know that other external factors influence the onset of white hair. These are more about behaviors and habits that we can indeed control.

Step No. 1: Protect your hair from the sun and pollution.

The UV rays emitted by the sun are not only harmful to the skin. They also generate free radicals in the cells of hair fibers, which trigger a cascade of reactions leading to the degradation of melanin, which promotes the appearance of white hair. Similarly, pollution can cause the release of free radicals in the body.

To protect one's hair, there are several hair sun protection treatmentsavailable today, often in the form of sprays or mists to be applied directly to the scalp and lengths. The principle of these products is the same as that of sun protection for the skin: to prevent UV rays from penetrating the body.

Wearing caps, hats, or scarves on days of intense sunlight or prolonged exposure is also a good idea. Similarly, if you live in a polluted environment, you can spray a pollution-fighting spray rich in antioxidants on your hair to protect your strands from particles, and/or wear a hat.

Step No. 2: Avoid smoking.

The World Health Organization (WHO) estimates that just over 20% of the global population smokes either occasionally or regularly. In addition to causing numerous health problems, tobacco can lead to premature hair whitening. Indeed, it is estimated that each puff of cigarette smoke releases about 200,000 free radicals. Therefore, to limit health risks and maintain naturally colored hair for as long as possible, it is advised to avoid smoking.

Step #3: Learn to manage stress more effectively.

Studies have shown that stress can play a role in the whitening of hair. The precise mechanisms are not yet known, but it appears that hormones associated with stress may disrupt the functioning of melanocytes, thus leading to a decrease in hair pigmentation.

In addition to making life more enjoyable, managing stress reduces the risk of premature graying. There are several methods to help control your response to stress, such as breathing exercises, yoga, meditation, positive visualization...

Select the one that suits you best and pair it with a healthy lifestyle. Indeed, sufficient sleep, engaging in physical activity, taking time for oneself, and having a pleasant social environment greatly help in reducing stress.

Step #4: Maintain a varied and balanced diet.

Deficiencies in vitamin B12, vitamin D, vitamin B9, selenium, iron, or copper can impact hair color and cause their premature graying. The mechanisms involved vary from one molecule to another. For example, copper plays a role in the activation of tyrosinase, an enzyme that facilitates the conversion of tyrosine into melanin. Selenium and zinc, on the other hand, act as antioxidants that protect melanin from damage caused by free radicals.

To mitigate the risks of premature graying and nutritional deficiency, it is crucial to maintain a healthy and balanced diet. Regarding the elements mentioned above, the table below summarizes in which foods they are most prevalent and what the recommended daily intake is.

NutrientRecommended Daily Nutritional IntakeFoods in which it is found
Vitamin B124 - 5.5 µgDairy products, eggs, meats, offal, fish, shellfish
Vitamin D2.9 - 3.1 µgFatty fish, mushrooms, dairy products, dark chocolate, cereals
Vitamin B9300 - 330 µgLegumes, leafy green vegetables, poultry
Selenium20 - 80 µgFish, crustaceans, meats, nuts
Iron10 - 20 mgMeat, seafood, legumes, spinach, tofu
Copper0.9 - 1.2 mgOffal, seafood, offal, seeds

Note : To date, there are few studies on the potential link between nutritional deficiency and the onset of white hair, which prompts us to be cautious about the impact of diet on hair whitening.

Sources

  • SEIBERG M. Age-induced hair greying - the multiple effects of oxidative stress. International Journal of Cosmetic Science (2013).

  • RAWNSLEY J. & al. Hair biology: Growth and pigmentation. Facial Plastic Surgery Clinics of North America (2018).

  • PHILPOTT M. Watching hair turn grey. eLife (2021).

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