Sunlight Is a Nutrient Your Office Job Is Starving You Of

My dermatologist in the '90s was very clear: sunscreen every day, even in winter, even in the car. A hat. Sunglasses. The sun was the enemy — a slow, cumulative one that was going to age your skin and maybe kill you. I was a diligent patient. I wore SPF 30 on gray days in November. I took vitamin D supplements because that was the responsible substitute. I spent my working hours under fluorescent lights, then LED lights, and I called it being indoor

I think about that a lot now, because I spent a few hours this week watching a long conversation between Thomas DeLauer and Gerardo Gutierrez — a photographer-turned-photobiologist who founded Mitolux, a company building lamps designed to replicate the full spectrum of sunlight. And by the end of it, I was quietly annoyed at every office I have ever sat inside.

Here's the thing no one told us in all those years of responsible sun avoidance: the indoor light environment we swapped sunlight for wasn't neutral. It was optimized for energy efficiency and productivity. LEDs use less electricity. They last longer. They make sense in a spreadsheet. What they don't do, according to Gutierrez, is feed your mitochondria — because they've been stripped of the wavelengths your cells actually need to function.

"Modern light is basically like fast food," Gutierrez tells DeLauer, "and natural light would be like a good vegetarian organic diet."

That's a little cute, but the underlying argument is worth taking seriously.

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What the sun is actually doing

Gutierrez's framework treats light not as illumination but as information — a continuous signal your body uses to regulate nearly everything. The different wavelengths do different jobs. UVB triggers vitamin D synthesis and activates a molecule called POMC, which Gutierrez describes as your body's own pharmacy, capable of producing downstream chemicals including serotonin. UVA releases nitric oxide stored in the blood vessels — it's essentially a vasodilator, which is why Gutierrez calls a session of morning sun "nature's pre-workout." Infrared, which Gutierrez says accounts for roughly 55% of the sun's energy output at ground level (his framing — solar irradiance figures vary by methodology and atmospheric conditions), powers mitochondrial function directly and facilitates what researcher Gerald Pollack has called "structured water" — a form of H₂O that forms near biological surfaces and behaves differently from bulk water in ways that may affect cellular energy storage.

None of this is in your standard vitamin D supplement. When Gutierrez says you can't replicate the sun by taking a pill, he's pointing to something more specific than "whole foods are better than supplements" — he's describing what he calls a "light matrix," a system of interacting wavelengths that produces effects no single isolated component can reproduce. He suggests the sun triggers the production of perhaps 25 or so vitamin D-like chemicals whose functions we don't yet fully understand. That's his assertion, and the precise number doesn't have robust scientific consensus behind it — but the general principle that isolating vitamin D from its broader photobiological context may miss significant effects is a legitimate question researchers are actively sitting with.

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The angle that should make workers uncomfortable

Here's where I want to slow down, because this is the part that connects to something I write about a lot.

The LED transition wasn't about your health. It was about the electric bill. The energy-efficient office was designed around output metrics, the same logic that brought us open-plan floor plans (cheaper real estate per employee), always-on Slack (faster turnaround), and the mythology of the 4 a.m. productivity warrior. Human biology was not in the room when these decisions got made.

Gutierrez makes a point that I keep coming back to: modern buildings now have energy-efficient windows that block infrared. Your office glass filters out the part of sunlight that actually protects your skin from the UV that still comes through. You're getting a partial, unbalanced signal — and your body is receiving it all day, every day, without the context that makes it coherent.

"When you're not taking light the right way," Gutierrez says, "you're giving your body the wrong nutrients and the wrong inputs."

Your company didn't intend to make you tired, foggy, and strangely resistant to sleep by 11pm. But the built environment they optimized for cost and output accomplished exactly that, and the science Gutierrez is describing suggests the mechanism: a flat line of 500 lumens all day, no morning cortisol spike, no evening wind-down signal, no infrared feeding the mitochondria, no circadian contrast between day and night. Your nervous system is receiving a signal that says: it is always the same gray Tuesday.

And then we wonder why the wellness industry has to sell us so many supplements to compensate.

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The practical picture

Gutierrez lays out a sequencing logic for sunlight exposure that most people are completely reversing. Morning light — the soft, infrared-rich light when the sun is near the horizon — prepares your skin and eyes to handle UV later in the day. It's not UVB or UVA; it's mostly infrared, which means it's not burning you or tanning you. It's charging you. When people go to the beach without any morning exposure, jump straight into noon sun wearing sunglasses, and then burn — that's exactly the sequence Gutierrez says creates the problem. The sunglasses prevent the signal that would start melanin production. The skipped morning infrared means their skin wasn't primed.

"If you get the early morning light, that's basically a red light therapy lamp for free," he says, noting that the infrared-heavy wavelengths at sunrise are almost identical to what people are now paying hundreds of dollars for in a panel.

On the LED flicker issue: Gutierrez connects the flicker in cheaper or older LED products — which can arise from AC electrical current cycling — to nervous system stress, describing his own experience of anxiety under fluorescent lights as a child. It's worth noting that this is more accurately a problem with lower-quality or older LED drivers; many modern LED systems use higher-frequency switching that significantly reduces perceptible flicker. The concern isn't universal to all LEDs, but it's a real variable in light quality that's worth checking rather than assuming.

For screen-heavy environments, his practical hierarchy is: during the day, don't block blue light — instead, add more bright light and mix in incandescent bulbs to restore some infrared. At night, switch to incandescent or warm light sources, and use blue-blocking glasses if you're still on screens. His phone runs in monochromatic red mode after dark, and he reports falling asleep within minutes of switching it on.

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The Swedish study, and what it actually says

Gutierrez references a real and striking piece of research: Lindqvist et al. (2016), a Swedish cohort study that followed approximately 30,000 women over about two decades. The finding was that women who actively avoided sun exposure had significantly higher all-cause mortality than those with high sun exposure — a risk the researchers compared in magnitude to smoking. That's the headline, and it's accurate. The caveat worth holding onto: this was a cohort of women in Sweden, a high-latitude country where sun exposure patterns, lifestyle factors, and baseline vitamin D levels may not generalize cleanly to all populations. It's a significant finding, not a universal law.

The NASA red light story Gutierrez tells — researchers discovering healing benefits during plant-growth experiments in the 1990s — is a commonly circulated origin story associated with scientist Harry Whelan's work, though the actual history of those SBIR-funded studies is more layered than the clean discovery narrative suggests. The underlying science on red light and wound healing is real and well-documented. The story around how we got there is somewhat tidier in the telling than in the archive.

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What I'm actually going to do differently

When Gutierrez describes his own story — he went through a divorce, was put on antidepressants and TRT, and started reading his way out — I recognize something. Not the specifics, but the shape of it: the feeling that you've been managing symptoms of something structural, one supplement at a time, without ever asking what you're structurally missing.

He started getting sun on his skin in El Salvador and felt better from day one. Not after two weeks of building up vitamin D levels — from day one, because serotonin responds to light acutely. He eventually built a lamp because the rainy season came and he couldn't find anything on the market that replicated the full-spectrum signal.

There are some genuinely speculative corners of this conversation — the "mitochondria as quantum engine" framing, the structured water discussion — where the science is frontier-level at best and contested at worst. I'm not here to tell you to bet your health decisions on it.

But the parts that don't require any particular leap: get outside in the first hour of light. Swap the bedroom and living room LEDs for incandescent. Stop wearing sunglasses on morning walks. Get off your phone in a dimmed room an hour before sleep. None of this costs money and none of it requires you to believe anything exotic.

Tomorrow morning, I'm going to walk outside before I open my laptop. Not because a photobiologist told me to. Because I spent twenty years doing everything responsibly — the sunscreen, the supplements, the carefully managed indoor existence — and I'm done treating the sun like a liability to be mitigated.

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By Vanessa Torres, Career & Workplace Writer