Red Light in March: Solar Callus and DHA
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March arrives and something shifts. You feel it before you can explain it. The light has a quality to it again -- that low golden angle in the morning that actually does something to you rather than just existing. The snow is still there in patches. It is still cold enough that you are not exactly stripping off in the garden - well not everyone is..... but I am!
But it is different. And your biology knows it. You feel it in the warmth of the sun!
This is the transition month. And if you understand what it means, you can use it in a way that most people completely miss.
What Is a Solar Callus and Why March Is the Time to Start
Most people know what a callus is on their hands or feet -- the skin's way of adapting to repeated pressure or friction. A solar callus is essentially the same principle applied to UV exposure. You build your skin's capacity to handle sunlight gradually, starting when the UV index is still low, so that by the time May and June arrive your skin is prepared rather than shocked.
Here's the part that gets missed: this is not just about avoiding sunburn.
Melanin - the pigment that gives your skin colour - is not simply there to tan you in summer. It is a biological structure. It's almost magic in what it can do. Researchers working at the intersection of quantum biology and melanin highlighted something that most dermatologists simply never considered: melanin is a photoreceptor and an energy transformer. It absorbs light across a wide spectrum and does things with it that go far beyond pigmentation.
When you gradually expose your skin to sunlight from March onwards, you are doing several things at once. You are beginning to stimulate melanin production so that stronger UV later in the year meets prepared skin. Now, in march, we are not talking about meaningful (if any) stimulation of early vitamin D conversion (there is still some debate about direct UVB exposure and reflected UVB from the upper atmosphere and how meaningful it might be). We do have UVA, nitric oxide release, and serotonin synthesis directly in the skin itself. You are essentially telling your mitochondria "right, we are coming back online." And they listen.
I am already out on my sheltered south-facing terrace here in Drammen when the sun is at the right angle. Face, arms, chest when it is warm enough. Even 15 to 20 minutes of March sunlight on your skin is valuable - not just for the downstream hormones and vitamins, but because you are recalibrating photoreceptors that have been largely dormant since October.
Start now, not in June when everyone else scrambles. By then you are already behind.
Does This Mean You Stop Using Red Light? Don't Be Silly
This question comes up every spring without fail and it makes me smile a little, in a kind way. People assume that because the sun is returning, the red light panel (rødlysterapi) becomes redundant. That is like saying you stop eating protein in summer because the shops are open longer.
We just change how we use it.
In winter, I use the panel at any point in the morning, partly because there is no sunrise worth catching in December and January in Norway before using the red light. I will catch it, but usually after the red light. It serves as a powerful stimulus for cytochrome c oxidase - the enzyme in your mitochondria that is the primary chromophore for red and near-infrared wavelengths. It kicks the mitochondria into higher gear, helps produce ATP, and does a lot of the work that the sun would do if it existed at 8am in Norwegian winter.
In March, the protocol becomes additive rather than substitutive.
Now I aim to get the natural sunrise first. Even ten minutes outside in that low-angled morning light. Then I come inside and use the red light panel. You are layering the stimulus. The natural morning sun delivers a full spectrum (or close to) - UV, visible, infrared - in ratios that your biology evolved for over hundreds of thousands of years. The panel delivers a concentrated therapeutic dose of red and near-infrared that amplifies what the sun started.
Think of the sunrise as your warm-up. The panel is your session.
And it is worth saying clearly - it is still not warm enough in Norway in March to get meaningful skin exposure for most people. You might have a sheltered spot like I do, but you are not going to be outside topless for extended periods in most of the country until well into April or May. The panel fills that gap and continues to fill it right through spring.
If You Have Not Been Upping Your DHA, Start Now
This is the one that the biohacking and natural health space still overlooks far too often. And I am not sure why, because the research is not new.
DHA is a long-chain omega-3 fatty acid. It makes up a significant portion of your cell membranes - particularly in the brain, retina, and the inner mitochondrial membrane. Here is the part that matters for this conversation: the more DHA in your membranes, the more efficiently they handle light. Want to cope with Light - eat more DHA.
Dr. Jack Kruse has written and spoken about this at length. DHA-rich membranes are more fluid, more sensitive to photons, and better at the quantum electron transfer processes that underlie mitochondrial function. When UV light hits a DHA-rich membrane, the resonance is different. The downstream signalling is different. You convert sunlight into biological energy more efficiently.
If you have been eating tinned tuna and not much else for omega-3s over winter, your membranes are not in great shape to make use of the increasing sunlight. You are trying to run a high-performance engine on the wrong fuel.
The good news is that the best sources are already Norwegian staples if you are actually eating them:
Sild (herring) is genuinely excellent for this. Mackerel. Sardines. Wild salmon. Torskelever - cod liver in tins - which you can pick up from almost any Rema or Meny and which is far better value than most fish oil supplements. Anchovies. Fish roe. Whole food sources beat supplements almost every time and I will tell you why.
Cod liver oil works as a supplement, just make sure it is a quality source stored properly. The DHA in it degrades with heat and light exposure, so check how it is packaged. And if you have been running high on omega-6 seed oils through winter - sunflower oil, rapeseed oil in every processed food - that is worth addressing because omega-6 competes with DHA at the membrane level and creates oxidative stress when hit by UV. That is a longer conversation, but the short version is: vegetable oils and strong sunlight do not mix well at the membrane level.
Start increasing DHA now. Give it four to six weeks and you will notice something in how your skin responds to sun exposure and how your energy tracks through the day. It is subtle. But it is real.
What I Am Actually Doing Right Now
Since practical beats theoretical every time, here is what the March routine looks like for me:
Morning: Outside as close to sunrise as I can manage, south-facing terrace, face and arms exposed. Ten minutes minimum. Then inside for a red light session, panel at chest and face distance. I am layering the stimulus, not replacing one with the other.
Midday: If the sun is out and I have a break, I get outside again. Even standing in direct light for ten to fifteen minutes. No sunscreen in March - the UV index is too low to cause meaningful damage and I am trying to stimulate, not block.
Diet: Sardines, mackerel, herring regularly. I am keeping seed oils as low as possible for the reasons above. Butter and coconut oil are used mostly for cooking, Olive oil on cold foods if needed.
Evening: Circadian-friendly lighting on after sunset, blue light blocking glasses when using screens. This part does not change with the seasons. The sun going down is still a biological signal that needs to be respected regardless of what month it is. Yeah I know, in Norway the sun doesn't always go down - so we need blue blockers and curtains to mimic it in the summer as well as the winter.
A Note for Expats in Norway
If you moved here from a sunnier country, your baseline melanin may be quite different from someone who grew up here. You might actually be more reactive to early spring UV than a Norwegian who has been through decades of these seasonal transitions. The solar callus principle applies - possibly even more so for you.
Build slowly. Start with the face in morning light. Add skin surface gradually as it warms up. Use the red light panel as your year-round foundation and let the Norwegian sun complement it rather than replace it.
The Bigger Picture
What we are really talking about is matching your biology to the seasonal environment. Your ancestors did not have a choice - they were outside, they ate local and seasonal food, they moved through the year in rhythm with the light. No mørketid hibernation inside under cool-white LEDs for them.
We have tools now that they did not. Red light panels that extend our therapeutic light access through the dark months. Grounding mats and sheets that reconnect us to the earth's electron field even when the ground is frozen solid. Circadian lighting that keeps our evening environment matched to our physiology.
But those tools are most powerful when you are also doing the basics right. And in March, the basics mean getting outside in that morning light, building your solar callus while the UV is still gentle, and making sure your membranes have the DHA they need to actually use the sunlight that is on its way.
The sun is returning. Make sure your body is ready to receive it.
FAQ
Q: When should I start building a solar callus in Norway?
March is ideal for us. The UV index is low enough that you are not going to cause damage, but high enough to start stimulating melanin production and the other photobiological processes that prepare your skin for summer. Even 15 to 20 minutes of direct morning sun on the face and arms is enough to begin. Get outside during the midday sun for a different stimulus.
Q: Should I stop using red light therapy (rødlysterapi) when spring arrives?
No. The protocol shifts rather than stops. In spring, aim to get the natural morning sunrise first, then use your red light panel to build on that stimulus. They work together. The sun gives you the full spectrum; the panel gives you a concentrated therapeutic dose of the wavelengths that drive mitochondrial function.
Q: What is DHA and why does it matter for sun exposure and light therapy?
DHA is a long-chain omega-3 fatty acid that makes up a large part of your cell membranes. Higher DHA makes your membranes more responsive to light and better at the electron transfer processes that underlie mitochondrial function - which matters both for red light therapy (fotobiomodulasjon) and for how efficiently you convert natural sunlight into biological energy. Eat fatty fish. Sild, makrell, sardines, torskelever. Start now.
Q: What red light panel should I use at home in Norway?
That depends on your space and what you are trying to achieve. Browse the red light panels collection and get in touch if you want a direct recommendation. I will ask a few questions and point you toward what makes sense for your situation, not just the most expensive option on the shelf.
Disclaimer: This blog is for educational purposes only and does not constitute medical advice. Red light therapy devices sold at LightTherapy.no are general wellness devices, not medical devices. Always consult a qualified healthcare professional for any health concerns.
Ready to build your spring protocol? The red light panel collection is where to start.