Text written in 2023. Looking back in 2024 and then 2025, I could tell so many different stories from this one, a story that has become my own, and also that of my closest loved ones, knowing that each of these perspectives is based on lived experience, true, and makes me almost nostalgic for this struggle.

The Loïs Kedochim® brand is new…

But I took the first step in 2020.

It’s been a turbulent journey, and I’m sharing part of it with you.

Let’s dive, if you will, into 2015. As for me, I was in my third year of medical school in Lyon, France.

I had a hard time with technology, especially screens. I only studied my medical courses using books, I didn’t have a smartphone (I’d replaced it with an unbreakable Nokia), and I never used my computer. I did a lot of sports :-). A lot of trail running, more than a passion, an intuitive way of discovering life, risks, and Nature. I didn’t have Wi-Fi at home in my fourth and fifth years, and I avoided screens.

Why did I avoid screens? Simply because I had this instinct.
That little voice telling me: “Screens distract you, they keep you awake, they burn your eyes, and they give you a headache.” In short, “they’ll prevent you from passing your exam.”

The next five years didn’t see any major changes in my relationship with this technology.

Then came my entry into the working world. My first paychecks. My first bank appointments with the status of a modern young worker. And, when I signed my bank documents with my indestructible Nokia, my banker would politely suggest I buy a smartphone. Which I did. Then came the infamous year 2020. The world went digital at breakneck speed. Children no longer looked at their parents—at home, in restaurants, on public transport, everywhere. And I saw the detrimental effects on my daily life of the time I spent on my brand-new smartphone.

So, out of curiosity, and then out of passion, I devoured a vast amount of readily available scientific information on the dangers of artificial blue light. This highly energetic light is emitted by all the light-emitting diodes (LEDs) and fluorescent lamps (neon lights) that are ubiquitous today: screens, but also car headlights, streetlights, restaurant lighting, train and subway lighting, video advertisements, supermarkets, and of course, offices… I was struck by the evidence of these harmful effects on our health and well-being. Lens, retina, brain, melatonin, circadian rhythm, mood, chronic illnesses, migraines, hormones, digital eye strain… Everything is disrupted by such a simple yet powerful and intrusive stimulant. Because I would later discover that, if we are alive, it is primarily thanks to light.

I also observed the lack of long-term research on this recent phenomenon of intense and chronic overexposure to light, and assessed the potential consequences on our physiology that remain to be discovered. Science doesn’t know everything. Especially about the nervous system. Yet, the eye is already, in part, part of the nervous system. During this research phase, I often thought of the tobacco industry, which enjoyed a lack of suspicion regarding the disastrous effects it was having on everyone’s health.

Then I wrote a 330-page ebook, drawing on over 700 studies, logically explaining the negative impact of artificial blue light on our bodies, our minds, our circadian rhythms, and therefore our daily lives. Incidentally, if it’s so harmful, why is it used? Because it’s the most energetic form of visible light, and therefore the one that most stimulates our visual and nervous systems. This earned three Japanese scientists—Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura—the 2014 Nobel Prize in Physics. Incandescent light bulbs illuminated the 20th century; and the 21st century is now lit by LED and fluorescent lamps. Moreover, the cost of this light is negligible.

But, while writing the ebook had given me some answers, I still had questions. Even knowing that the world isn’t fair—it’s real—I still had this obsession with justice. And these injustices kept looping in my mind:

“Why am I forced to work even in the evenings on screens that, I feel, are damaging and exhausting my health and my daily life?”

“Why do even my evening relaxation routines prevent me from recovering my energy during the night?”

“Why do we fanatically adopt all the new technologies invented in less than 30 years without knowing even 5% of the consequences they have on our Homo sapiens physiology, which has remained the same for 300 years?”