Last modified Sep 3, 2025
1. Increased pollution and oxidative stress
In winter, your body is subjected to more oxidative stress - caused by lack of light, seasonal fatigue and air pollution.
This oxidative stress generates free radicals that attack hair lipids and proteins.
As a result, the fiber becomes damaged, duller and loses its ability to reflect light.
Blond therefore appears darker, "dirtier" visually, even without a change in pigment.
2. Decreased natural oxidation of melanin
Hair color depends mainly on melanin .
In summer, exposure to UV rays and heat causes photo-oxidation of melanin, i.e. the natural breakdown of dark pigments (eumelanin).
Result: hair lightens slightly, giving it summery golden highlights.
In winter, this oxidation no longer occurs: melanin remains stable, making the shade visually darker and "cooler".
3. Modification of light reflection
Cold and heat damage hair's hydrolipidic film .
The scales lift, the surface becomes irregular and light is diffused rather than reflected.
The result: hair looks dull, matte and darker.
The INCREDIBLE results of the
readers of the Grand Livre...
"I was tired of seeing
my blond hair darken every winter."
- Eléonore, 28 -
After using all the techniques described in "Le Grand Livre de l'éclaircissement", Éléonore was able to rediscover her childhood blond hair without going to the hairdresser (and in winter)!
"The tips in the Big Book have clearly saved my life!
Before I started applying them, I despaired of seeing my blonde fade and darken every winter...
Since then, I've come back to life and my blonde glows even in winter!"
- Marine, 34 -
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