Morning Red Light Therapy and Blood Sugar: What Nobody Tells You
Share
Morning Red Light Therapy and Blood Sugar: What Nobody Tells You
Red Light Therapy in the Morning: The Blood Sugar Connection Nobody talks about
Most people think about blood sugar in terms of what they eat. Low carb, high protein, avoid the sugar, watch the glycaemic index. And yes, food matters. But here's what almost nobody is telling you: your blood sugar regulation for the entire day is being shaped before you even put anything in your mouth.
It starts with light. Specifically, the light you get (or don't get) in the first hour or two after waking.
I use red light therapy every morning. Not because it's a ritual or a habit I've mindlessly stuck to, but because once you understand what it's actually doing at the cellular level, skipping it starts to feel a bit like skipping sleep. You CAN do it. You'll probably be fine. But over time, you're leaving something significant on the table.
Let me explain what's actually going on.
Your Body's Clock Is Running the Show
Before we get to blood sugar specifically, you need to understand that almost every metabolic process in your body is time-dependent. Your liver, pancreas, gut, and fat cells all have their own internal clocks, and those clocks are set and synchronised by light signals received at your eyes and skin first thing in the morning.
This is the work of circadian biology. Dr. Jack Kruse has written and spoken extensively about this, and the core idea is this: light is not just energy. Light is biological information. It tells your body what time it is, and your body uses that information to prepare the appropriate metabolic machinery for the hours ahead.
When those light signals are weak, absent, or wrong (blue-dominant artificial light instead of the red and near-infrared heavy spectrum you'd naturally get at dawn), your metabolic clock gets a confused signal. And a confused clock means confused blood sugar regulation.
What Red and Near-Infrared Light Does to Your Mitochondria at Dawn
Here is where it gets genuinely fascinating. At sunrise, the sun is low on the horizon. The atmosphere filters out much of the shorter blue wavelengths and lets the longer red and near-infrared wavelengths through in abundance. This is not an accident of physics. It is the signal your biology has been calibrated to receive for hundreds of thousands of years as a wake-up call.
When red and near-infrared light hits your tissue, it is absorbed by cytochrome c oxidase in your mitochondria. This kicks off a cascade: ATP production increases, nitric oxide is released (which improves blood flow and cellular signalling), and critically, your cells become more responsive to insulin.
Insulin sensitivity. That's the key phrase here. Because insulin sensitivity is essentially how well your cells respond to the signal to take up glucose from the blood. High insulin sensitivity means your cells respond efficiently, blood sugar stays stable, and your pancreas doesn't have to work overtime. Low insulin sensitivity means glucose lingers in the bloodstream, insulin keeps getting pumped out, and you end up on the blood sugar rollercoaster that most people assume is just... normal.
It isn't normal. It's the consequence of living in a light environment that doesn't match our biology.
The Cortisol Connection
There's another piece to this that is worth understanding. Cortisol, often unfairly labelled purely as the "stress hormone," is supposed to peak in the morning. This is called the cortisol awakening response, and it is a healthy, necessary part of waking up properly. Morning cortisol mobilises glucose into the bloodstream to give you energy for the day, sharpens focus, and gets you going.
The problem is when morning cortisol is blunted (because your circadian signals are disrupted) or when it peaks at the wrong time. Both situations mess with blood sugar. Red light in the morning helps set that cortisol curve correctly by giving the hypothalamus the light signal it needs to time everything properly.
I've noticed this in my own experience. On mornings when I use red light early, I feel genuinely awake and clear headed without needing to immediately reach for caffeine. On mornings I skip it (which does happen occasionally)... it takes longer. The body is waiting for a signal it hasn't received.
How This Shows Up in Your Food Choices
This is the part that I think is most practically useful, because it connects the biology to something you'll actually notice in your day.
When blood sugar regulation is functioning well from the start of the day, the downstream effects on hunger and cravings are significant. Here's roughly what happens:
Stable early blood sugar means your hunger hormone ghrelin behaves predictably. You feel genuinely hungry at meal times, not driven by a blood sugar crash demanding immediate high-calorie, high-sugar food.
When you are chasing a blood sugar crash, your brain specifically craves fast-releasing carbohydrates and sugars. That's not weakness or poor willpower. That's your brain doing exactly what it's designed to do when it detects an energy crisis. Getting proper morning light reduces the frequency and intensity of those crashes, which means those cravings simply don't hit as hard or as often.
I've spoken to many people who have cleaned up their diet considerably and still struggle with afternoon cravings and poor food choices. When we dig into their mornings, it's almost always the same picture: waking up to a dark room, going straight to a screen, getting artificial light from above while their circadian clock sits there waiting for a signal that never properly comes.
Fix the morning light, and the food choices often get easier. Not because you've suddenly developed more discipline, but because the biological conditions that make good choices difficult have shifted.
What My Morning Actually Looks Like
Since I have the photo to prove I actually do this and it isn't just theory.......
I use my panel in the morning before I've eaten. Fasted morning red light is something I'm personally a fan of, because in a fasted state your cells are in a more receptive mode for the mitochondrial signalling that red light drives. It's also when cortisol is naturally highest, which means the light and hormonal environment are aligned.
I keep the session relatively short in the morning, somewhere in the 6-12 minute range depending on distance, because morning dosing is about the circadian signal as much as it is about direct tissue effects. You are not trying to maximally stimulate every cell in your body. You are telling your biology what time it is and giving it the tools to set the metabolic tone for the day.
Combine this with getting actual sunlight on your face and eyes as early as possible on clear days (even in Norwegian winter, getting outside matters), and you start to build a morning routine that works WITH your biology rather than against it.
For Us in Norway, This Is Especially Important
ESPECIALLY in winter. I keep coming back to this because it genuinely cannot be overstated for those of us living at these latitudes.
In January in Drammen or Oslo, you might not see meaningful sunlight until 9am on a good day. If you're up at 6 or 7am, your body's light environment for those first couple of hours is entirely artificial. Office lights, phone screens, ceiling LEDs. All of these deliver the wrong spectrum at the wrong time. Your mitochondria are waiting for red and near-infrared. They're getting blue and white instead.
This is not a minor inconvenience. Over weeks and months of winter, this chronic misalignment of your light environment and your biology compounds. Blood sugar becomes harder to regulate. Cravings increase. Energy fluctuates. Mood drops. Most people chalk this up to "winter" as if it's just something to endure.
Red light therapy in the morning doesn't solve everything, but it provides that missing dawn signal that your cells are biologically expecting. It is one of the most practical, accessible things you can do to keep your metabolic machinery running properly through the dark months.
Practical Starting Points
If you want to try this for yourself, the Restore red light therapy panel collection is where I'd start for a home panel setup. For a more portable option that you can use while sitting down in the morning, the portable device range gives you flexibility.
Morning use does not need to be complicated. Panel on, sit or stand in front of it, normal morning things while the light does its work. The consistency is what matters more than any specific protocol.
If you have questions about how to set this up for your own situation, get in touch. This is one of my favourite topics to talk through because the results people notice when they sort their morning light are often faster and more obvious than they expect.
LightTherapy.no is based in Drammen, Norway. All stock held locally for rapid delivery across Norway. Free shipping over 3000 kr. Payment by Klarna, Stripe, or Vipps.