lumière bleue
Blue light and skin: what is actually known
Many commercial promises, little solid evidence. What is established, and what is not.
What is documented
High-energy visible light can contribute to pigmentation, especially on melanin-rich skin. It is a recognised factor in melasma.
But the main exposure remains the sun, not a computer screen: the difference in intensity is orders of magnitude.
What genuinely protects
Tinted mineral screens, thanks to the iron oxides in the pigment, block part of the visible spectrum — far more than a classic transparent sunscreen.
In other words, the best protection against blue light is the same product as against UV, provided it is tinted.
What matters more
Screen-related sleep loss has a far better documented effect on skin than the light itself: slower repair, dull complexion, more visible dark circles.
Before buying an “anti blue light” product, it is more worthwhile to address hydration and sleep.
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