Welcome to the deep dive.

Today we're tackling something that's, well, it's everywhere in skincare right now.

High energy, visible light.

Right.

Hev light.

Or you know, what most people just call blue light.

Exactly.

And specifically its impact on your skin.

We've all seen those anti blue light products popping up.

Serums, sunscreens, moisturizers.

It's a huge trend.

And it really took off, didn't it?

Alongside our big shift to digital everything.

More screens, more video calls, for sure.

And our sources suggest this isn't just a blip, this reliance on digital communication.

It's here to stay.

It's a daily habit now.

So the market is definitely responding to a real concern people have.

Absolutely.

So the big question we need to answer for you today is pretty straightforward, but really important.

Is all that time staring at your phone or your laptop genuinely aging your skin?

Or is it maybe, you know, clever marketing playing on our screen time anxieties?

That's what we're here to figure out.

That's the mission for this deep dive.

Yeah, yeah.

Cutting through the hype.

So maybe we should start with a clear definition.

Good idea.

We're talking about electromagnetic radiation, visible light.

Specifically the wavelengths between about 400 and 525 nanometers.

And it's called high energy visible light for a reason.

Exactly.

It's right next to UVA on the spectrum, energy wise.

And that high energy means it can actually penetrate the skin, often deeper than UV light can.

Okay, deep penetration high energy.

That sounds, well, bad.

But the sources we looked at suggest it's not quite that simple.

We need to talk about scale.

Right.

Starting with where most blue light actually comes from.

That's crucial.

Scale is everything here.

The number one source, like by a mile is the sun.

Makes sense.

That's why the sky is blue, isn't it?

Precisely.

Those shorter blue wavelengths get scattered most by the atmosphere.

Now, artificial sources, LEDs, TVs, laptops, flowers, phones, they do emit blue light, but.

The amount is tiny in comparison.

Staggeringly tiny.

We hear all this stuff about phone screens, but there was some really interesting research back in 2021 from the Bearsdorf Center.

Oh yeah, I saw that one.

What did they find again?

Well, they were pretty blunt.

They said the amount of blue light from conventional device use, their words, were nowhere near enough to trigger harmful skin effects.

Wow.

Nowhere near enough.

That's strong.

And they had this great analogy.

To put it in perspective, they actually measured the dose.

Okay.

They found that spending an Entire week, like 168 hours straight in front of a monitor at a normal distance.

Yeah.

Would give your skin the same blue light dose as just one minute outside on a sunny summer day.

Wait, hang on.

One minute?

An entire wink equals one minute of sun.

That's what the research showed.

It really highlights the difference in intensity.

Genuinely surprising.

So how do we square that with all the fear around screens?

It sounds like the sun is the real issue here.

Well, based on that research, in terms of the sheer energy energy dose hitting your skin, yes.

The sun is the overwhelming concern for things like oxidative stress, premature aging from blue light.

So if you're not protected from the.

Sun'S blue light, Then worrying excessively about your screen might be missing the bigger picture.

At least from an energy standpoint.

Okay, that analogy really helps put the fear in check.

But is there another side to it?

Even if the energy per second is low, what about the fact we use these things for hours right up close?

Is that the counterargument?

That's exactly the nuance dermatologists bring up.

It's not about the intensity at any given moment, which is low.

It's about two the prolonged duration.

Hours and hours every day.

Right.

And the proximity.

We hold phones centimeters from our faces.

Sit close to monitors, Often late into the night, too.

Yes.

And this kind of chronic long term exposure, even if it's low intensity, is still worth looking at.

Because the way blue light comes causes damage.

Well, that mechanism is basically the same whether it's from the sun or a screen.

Ah, okay, so it's a cumulative effect over years, Maybe even from a weaker source.

That's the concern.

Yeah.

It could sneak up on us.

So let's shift to that mechanism then.

If blue light gets in deep, what's it actually doing down there?

How does it cause photoaging?

Okay, so there are mainly three ways.

Three proposed pathways that seem interconnected.

First up is oxidative stress.

When this high energy light gets down into the dermis, the lower layers, it generates a ton of free radicals.

You've probably heard of reactive oxygen species or ros.

Yeah, ros.

Nasty little molecules.

Exactly.

They're unstable.

They damage healthy cells.

It's like cellular chaos.

And what does that look like on the surface?

What does that damage cause?

Well, it speeds up the breakdown of the important stuff like collagen and elastin.

Ah, the things that keep skin firm and bouncy.

Right, so you get more fine lines, wrinkles, sagging.

Basically accelerated aging.

And that deep penetration is key because your standard sunscreen focused on UV might.

Not fully block that deep Reaching blue.

Light, it might not offer complete protection against that specific pathway.

No.

Which brings us to the second mechanism.

Pigmentation.

Okay.

Dark spots and uneven tone.

Yes.

Blue light is known to make hyperpigmentation conditions worse, especially things like melasma.

I've heard that it also causes something called persistent pigment darkening.

Ppd.

How is PPD different from just getting a tan?

The pigmentation from PPD can be, well, more stubborn.

It lasts longer and can be harder to treat than the tan you might get from uva.

And it affects everyone the same way?

No, actually, clinical studies show it hits harder.

Causes more visible hyperpigmentation and redness, especially in darker skin tones.

We're talking phototypes 3, 4, and up.

So people with more melanin need to be particularly careful about blue light protection.

It's definitely a significant factor for them.

Yeah.

Especially regarding that persistent darkening.

Okay, so oxidative stress leading to wrinkles and this aggressive pigmentation.

What's the third mechanism?

The third one is a bit different.

More systemic.

Maybe it's circadian disruption.

Ah.

Like how blue light messes with our sleep.

Exactly like that, but happening right in your skin cells.

They have their own internal bioclock, their circadian rhythm.

Okay.

Exposure to blue light, especially late at night from screens, basically tricks those skin cells.

They think it's still daytime.

And why is that bad for the skins?

Because skin cells have different jobs day and night.

Daytime is for defense protection.

Nighttime is when they switch into repair and renewal mode.

So if they think it's always daytime.

They don't get to do that crucial nighttime repair work properly.

And losing that repair time night after night can, you know, accelerate aging overall and make skin less resilient.

Wow.

So it hits us twice.

Direct image from the light and then stopping the repair process.

That's quite something.

The double whammy, potentially.

Hang on.

We should be fair.

Is all blue light bad?

Don't doctors sometimes use it for treatments?

That's a really important distinction.

Yes.

Dermatologists do use specific blue light LEDs in controlled settings.

For what kinds of things?

Things like acne, actually.

It can help reduce oil production and kill certain bacteria.

It's also used with special creams to treat precancerous spots.

So it's about the dose and the context.

Absolutely.

The right dose, frequency and context can make it therapeutic.

It's uncontrolled chronic exposure we worry about.

Which brings us back to the confusion in the shops.

We have the science saying the sun's the main issue, but shelves full of screen protection products didn't that group, Truth in Advertising, look into this.

They did, Tina.

And their report really flagged what they called a critical gap between marketing and evidence specifically for screen based blue light claims.

Meaning?

Meaning a lot of brands were sort of piggybacking on the general science about blue light, which again, mostly relates to the sun's intensity.

Without strong proof that their products specifically counteracted the effects of typical screen usage.

They weren't showing studies specific to phones and laptops.

Often not.

Or the studies weren't robust enough.

According to Tina, it highlighted a need for more specific evidence for those screen claims.

So if the science points mainly to the sun, why do you think consumers are still buying these screen specific products?

Well, I think it's tied to our habits, isn't it?

The sun feels like this big, obvious threat we deal with using sunscreen.

The screen, it's constant.

It's right there.

It feels different.

Maybe more insidious.

Yeah, that makes sense.

It's the thing we're exposed to for hours indoors.

Exactly.

And the industry sees that concern.

But what's interesting is that the best solutions, the ones with solid science, tend to tackle the damage mechanism itself.

Meaning they protect you regardless of whether the blue light came from the sun or your phone.

Precisely.

They address the oxidative stress or the pigmentation triggers, protecting you from both sources.

Okay, perfect segue.

Let's talk solutions.

What actually works?

You mentioned filtering the light and fighting the damage after.

Right, so starting with filtering.

Mineral sunscreens are a good starting point.

Zinc oxide, titanium dioxide.

The fissile blockers.

Yep.

They create a physical barrier, scatter light.

They give broad UVAUVB protection and some baseline blue light defense too.

They're generally stable and gentle on the skin.

But you said earlier they might not be enough for that deeper blue light.

Especially the pigmentation part.

That's where an unsung hero comes in.

Iron oxides.

Iron oxides.

Like the stuff that makes makeup tinted?

Exactly.

That.

Pigment studies show that adding iron oxides, which is what gives tinted sunscreens or foundations their color, significantly boost protection against blue light induced hyperpigmentation.

Wow.

So choosing a tinted SPF is actually better for blue light defense?

It seems so.

Particularly for preventing those dark spots.

It offers better protection in that specific visible light range compared to non tinted mineral filters alone.

How does the color help block it?

Well, zinc and titanium are great at scattering uv.

Iron oxides are particularly good at absorbing energy in the visible light spectrum and including that high energy blue violet end.

So they add this extra layer of defense.

Right where Blue light causes that stubborn pigment.

So my tinted moisturizer might be doing more heavy lifting than I thought.

Okay, what about the other approach?

Antioxidants.

They don't block the light itself.

Correct.

They work after the light gets through, they neutralize those damaging free radicals, the ROs, before they can wreck collagen and stuff.

Cleaning up the mess, basically.

Pretty much.

And our sources pointed to a few standouts proven in studies against blue light effects.

Niacinamide is a big one.

Vitamin B3 seems to be in everything these days.

It's a real multitasker.

But yes, studies concern it helps mitigate HEV or blue light damage.

Another interesting one was an extract from a microalga, Cynodesmus rubescens.

A specific algae extract.

Yeah.

Specialized ingredient showed good results.

Protecting against blue light stress in clinical tests.

Okay, and what about the classic antioxidants we already use for sun damage?

Vitamin C, vitamin E. Oh, definitely.

They're still highly relevant because they fight free radicals generally.

They also help combat the oxidative stress from blue light.

So vitamin C, E, green tea extracts do good choices.

Absolutely.

And carotenoids are particularly interesting.

Liking carrots?

Exactly.

Those phytonutrients.

Think orange, red pigments in plants, they can actually absorb some blue light energy directly.

So plant power in a way, yes.

Or extracts from them.

And then you see specialized complexes too, like one called Infragard, which uses tarotannins and sunflower sprouts to fight free radicals triggered by light.

Often it's a cocktail approach, a mix.

Of different antioxidants working together.

Makes sense.

Okay, so that covers products.

What about things we can just do, Especially for the screen exposure part.

Right.

The behavioral changes.

These are really effective because they tackle the source, at least the artificial source.

Like using night mode.

Definitely.

Switching screens to night mode or warmer reddish tones cuts down blue light output significantly.

Also, just dimming the screen brightness helps if you wear glasses.

Getting lenses with a blue light filtering coating adds a physical barrier.

And crucially, linking back to that circadian rhythm disruption.

Sleep.

Yes.

Prioritizing seven, eight hours of good quality sleep is vital.

That's when your skin does its repair work.

If blue light is messing with that, giving your skin the best possible chance to recover overnight becomes even more important.

Okay, so let's try and wrap this up.

What's the main takeaway from this deep dive?

Well, I think it's clear the sun's blue light is the biggest environmental source we need daily protection against.

That's non negotiable.

Right?

Daily defense Is key there.

But the sheer amount of time we spend close up with screens means that digital blue light exposure is a real secondary factor.

It's worth addressing, especially if you're prone.

To pigmentation or have sensitive skin, maybe.

Exactly.

And the best strategy seems to be twofold.

Use physical filters, ideally tinted with iron oxides, for that extra pigment protection, and.

Back that up with antioxidants.

And back it up with a good cocktail of proven antioxidants like niacinamide, vitamin C, and others to handle any free radicals that get through.

Okay, now, looking ahead, you mentioned the science is evolving, something about epigenetics.

Yeah.

This is where it gets really fascinating and maybe a bit more complex.

New research is starting to look beyond just oxidative stress.

They're investigating if blue light can cause epigenetic modifications.

Epigenetic meaning it changes how our genes work without changing the genes themselves.

Precisely.

So the idea is that blue light might be tweaking the expression of genes involved in, say, making collagen or controlling inflammation.

So it's not just damaging the existing structures, it could be changing the instructions the skin cells follow.

Potentially, yes.

Accelerating aging at a more fundamental molecular level, Possibly in ways similar to how UV damage operates.

Genetically, it's early days, but it's a really active area of research.

Wow.

Okay, so final thought for everyone listening.

What does this all mean, day to day?

We know we need daily protection from the sun's blue light Using those filters and antioxidants, definitely.

But if our digital habits, that constant screen time might be linked not just to wrinkles and spots, but potentially to these deeper molecular changes in how our skin actually ages.

Changing gene expression.

Does knowing that maybe make you think twice?

Does it change how quickly you reach for night mode, Even if it's the middle of the afternoon?

That's definitely something to mull over.