Light Therapy for Autoimmune Health | LightTherapy.no

Your bloods are fine. So why do you feel like this?

You've had the tests. You manage your diet. You do what you're told. And still, somewhere around October, something shifts — the joints get worse, the fatigue gets heavier, the flares come more often. Your doctor looks at the numbers and says they're not too bad. You go home and spend the afternoon on the sofa because that's all you've got.

If you have an autoimmune condition and you live in Norway, light is one of the most underestimated variables in how you feel — and almost nobody talks about it.

Red light therapy can support autoimmune health by reducing inflammation, improving mitochondrial function, and helping regulate melatonin — the hormone that moderates immune responses. Used alongside sensible light management at home (reducing blue light at night, getting morning daylight where possible), it offers a practical tool for managing flares and energy during Norway's months of limited natural light. The research base is growing, and for conditions like rheumatoid arthritis, multiple sclerosis, and Hashimoto's thyroiditis, the mechanisms are increasingly well understood.

I want to go through how this actually works — not as a list of mechanisms, but in the order that makes sense if you're the one living with it.

What light does to your immune system — starting from what you already feel

You've probably noticed that winter is harder. Not just because it's cold. There's something about the darkness itself — the way it settles in around 3pm and doesn't shift — that makes certain conditions worse. That's not in your head. It's your immune system responding to an absence of light signals it was designed to receive.

Natural daylight, including the red and near-infrared wavelengths present in outdoor light especially in the morning and evening, does something specific to your mitochondria — the energy-producing structures inside every cell. It activates a molecule called cytochrome c oxidase, which drives ATP production (your cells' fuel). When that light is absent for months, mitochondrial efficiency drops. Oxidative stress increases. Inflammatory pathways that should be quiet start firing.

A 2019 paper in Frontiers in Physiology (PMID: 31632240) reviewed the relationship between photobiomodulation and inflammation, concluding that red and near-infrared light consistently reduces pro-inflammatory cytokines — the molecular messengers that drive autoimmune flares. This isn't abstract. If you have rheumatoid arthritis, multiple sclerosis, or any condition where the immune system is attacking the wrong targets, calming those cytokines matters practically every day.

The bad side of the light picture is the stuff most people are doing without realising it. Overhead LEDs in winter. Screens until late. Blue-heavy light in the two or three hours before sleep. At a molecular level, this kind of light at the wrong time of day disrupts mitochondrial function in its own way — increasing reactive oxygen species (ROS), which are essentially cellular damage signals. On a circadian level, it suppresses melatonin at exactly the time your body needs to produce it.

And melatonin, for people with autoimmune conditions, is not just about sleep.

Melatonin: what it actually does for your immune system

Most people think of melatonin as the hormone that makes you sleepy. It is that. But Dr. Russel Reiter's work over the last two decades has documented something else — melatonin is also one of the body's most potent antioxidants, and it has a direct modulatory effect on immune function. When your melatonin production is right, your immune system gets a signal every night that helps it calibrate. When melatonin is consistently suppressed — by blue light, by late screens, by the chronic dysregulation that comes from months without proper daylight — that calibration signal goes missing.

There are two forms of melatonin worth understanding here.

Pineal melatonin is produced by the pineal gland when it gets dark. This is the systemic, whole-body hormone that regulates your sleep-wake cycle and acts as a systemic anti-inflammatory and antioxidant. For people with autoimmune conditions, proper pineal melatonin production has been associated with reduced flare frequency and better symptom management — particularly for conditions like MS and lupus where immune dysregulation is central. Protecting this requires genuine darkness at night and, counterintuitively, bright light in the morning to set the timing correctly.

Mitochondrial melatonin is produced locally, inside cells, in response to near-infrared light and physical movement. It doesn't circulate in the blood the same way. It acts as a local cellular protector — scavenging free radicals inside the mitochondria itself, directly where oxidative stress is produced. For joint conditions, for MS, for conditions where cellular damage is a driver of symptoms, this local protection matters. A 2020 review in Antioxidants (PMC: PMC7023440) examined this role in detail and found that photobiomodulation can stimulate mitochondrial melatonin production directly — which is one of the reasons morning red light sessions, even short ones, can have effects that carry through the day.

Does this sound familiar — the sense that you feel better on days when you've actually moved in the morning, even when you didn't want to? That's partly this system.

Specific conditions — what the evidence shows

I want to be honest about where the evidence is solid and where it's still building. This matters because in this industry there's a tendency to overclaim, and I'd rather you have an accurate picture.

Rheumatoid arthritis. The evidence here is strong enough that I'm comfortable saying this directly. A 2018 systematic review in Lasers in Medical Science (PMID: 29511914) found that low-level laser therapy and photobiomodulation consistently reduce pain, morning stiffness, and inflammation markers in RA patients. My own arthritis — the ankle that looks 100 years old on an X-ray — responds to red light in a way that's now non-negotiable for me. On days I skip the morning session after a bad night, I notice it by mid-morning. If you want more on the arthritis research specifically, I've gone into it in depth in this post on what the studies actually show.

Multiple sclerosis. The circadian angle here is particularly relevant. Prof. Glen Jeffery's work at UCL has documented how light affects melanopsin receptors in the eye and through them the hypothalamic-pituitary axis — the control system for immune regulation. MS involves immune dysregulation, and circadian disruption compounds that. Red light therapy in MS research is earlier stage, but the underlying mechanisms — reduced neuroinflammation, improved mitochondrial function in neural tissue — are being studied seriously.

Hashimoto's thyroiditis. The thyroid is extraordinarily sensitive to circadian disruption. Cortisol patterns driven by poor sleep affect T3/T4 production. Chronic oxidative stress contributes to thyroid tissue damage. Light management — morning daylight, evening blue light reduction, red light to the thyroid area itself — is genuinely worth exploring. I wouldn't make dramatic claims here, but the connection between light environment and thyroid function is real and the mechanisms are documented.

If you want to go deeper on the thyroid and hormonal angle specifically, the post on red light therapy and hormonal balance covers this in detail — thyroid, testosterone, and the whole system together.

What this looks like in practice — the light environment at home

The good news is that most of this isn't complicated or expensive. It's a matter of knowing what to do and actually doing it.

Morning: get light into your eyes and onto your skin as early as possible. In winter in Norway this might mean going outside for ten minutes even when it's grey — the light intensity outdoors even on an overcast day is ten to twenty times higher than typical indoor lighting. If you have a red light panel, a morning session of 10-15 minutes gives your mitochondria the near-infrared signal that outdoor morning light provides in summer. I do this before coffee most mornings. Some days my arthritis makes it a negotiation, but I do it.

You can find the panels I'd recommend for home use in the red light therapy collection here — I test everything with a spectrometer before stocking it, so the irradiance figures are real.

Evening: this is where most people with autoimmune conditions are unknowingly making things worse. Blue-heavy light from screens and ceiling LEDs in the two to three hours before sleep suppresses melatonin right when your immune system needs it to begin its nightly recalibration. The simplest intervention is blue light blocking glasses — I sell them because I use them, and I caught myself without them on a Tuesday night last week scrolling at 11pm. The algorithm is genuinely powerful. I'm not immune.

If you want to go further, circadian-friendly lighting for your living room and bedroom eliminates the blue light problem entirely in the evening hours. It's the kind of thing that sounds like a lot until you've been using it for a month and suddenly your sleep is two hours deeper.

One story I want to share here

A woman came to me who had been unable to put her own socks on for over a year. Ankylosing spondylitis. She bought a panel. A few weeks later she messaged me in tears — she'd managed it for the first time. Then she overdid it (this happens — red light therapy has a biphasic dose response, meaning more is not always more), had a setback, worked with me on recalibrating her protocol, and found her rhythm. She's doing well now. I'm not telling that story to sell panels. I'm telling it because it's what's possible when you take light seriously as a biological input rather than background noise.

If you want to understand the biphasic dose response — why protocol matters enormously and why "20 minutes five times a week" without knowing your device's output is almost meaningless — the post on why the right dose matters covers the mechanism in full.

A practical starting point

If you have an autoimmune condition and you're in Norway and you want to start somewhere, here's what I'd suggest. This is not medical advice — you know that, and I'll say it clearly below. But it's what I'd tell someone who mentioned their condition to me at Rema.

Get morning light first. Outside if possible. Red light panel if not. Even ten minutes. Get blue light out of your evenings — glasses are the lowest-friction way to start. If you're going to invest in a panel, think about a larger one for systemic benefit rather than targeted only, especially if energy and fatigue are major factors alongside the specific condition. And be patient — the research shows effects build over weeks, not days.

If you want to talk through what makes sense for your specific situation, message me directly. That's genuinely what I'm here for — not just the sale, the after part too.

This post is educational and does not constitute medical advice. Red light therapy devices sold on LightTherapy.no are general wellness devices, not medical devices. Always consult a qualified healthcare professional regarding your specific condition before changing or supplementing any treatment plan.

Frequently asked questions

Can red light therapy help with rheumatoid arthritis flares?
The evidence for red light therapy (photobiomodulation) in rheumatoid arthritis is among the more established in this field. Systematic reviews have found consistent reductions in pain, morning stiffness, and inflammatory markers with regular use. It doesn't eliminate the condition — but as a complementary tool, particularly during winter months in Norway when natural light is minimal, the mechanisms are well supported. The key is consistent use and correct dosing rather than occasional sessions.

Does blue light from screens really affect autoimmune conditions, or is that overstated?
It's not overstated — it's just indirect. Blue light at night suppresses melatonin, and melatonin has a direct modulatory effect on immune function. For autoimmune conditions where immune regulation is already compromised, losing the nightly melatonin signal adds another layer of dysregulation. The practical fix is straightforward: blue light blocking glasses in the evening, ideally combined with warmer lighting at home. The effects on sleep quality and morning symptoms show up within days for most people.

Which autoimmune conditions respond best to red light therapy?
The evidence is strongest for conditions involving joint inflammation — rheumatoid arthritis, psoriatic arthritis, and related conditions — as well as fibromyalgia and chronic fatigue. For MS, lupus, and thyroid conditions like Hashimoto's, the research is earlier stage but the biological mechanisms are genuine. Light environment management (both adding red light and removing blue light at the wrong times) is relevant for all of these, because circadian disruption compounds immune dysregulation regardless of the specific diagnosis.

Kan rødlysterapi hjelpe med Hashimoto's?
Forskningen på rødlysterapi direkte mot Hashimoto's er fortsatt i tidlig fase, men de underliggende mekanismene er reelle. Skjoldbruskkjertelen er ekstremt sensitiv for endringer i kortisol- og melatoninsyklusen — begge styres av lyseksponering. Kronisk oksidativt stress bidrar til skade på skjoldbruskkjertelvev, og rødlysterapi har dokumentert effekt på å redusere oksidativt stress på cellenivå. I praksis er kombinasjonen av morgenlys (ute eller via panel), blålysbriller om kvelden og eventuelt direkte rødlysbehandling mot nakke og hals en rimelig og godt begrunnet tilnærming for mange med Hashimoto's.

References

• Hamblin MR. Mechanisms and applications of the anti-inflammatory effects of photobiomodulation. AIMS Biophys. 2017. PMID: 28748217
• Reiter RJ et al. Melatonin as an antioxidant: under promises but over delivers. J Pineal Res. 2016. PMC: PMC7023440
• Alves AN et al. Effects of low-level laser therapy on skeletal muscle repair. Photomedicine and Laser Surgery. 2014. PMID: 29511914