This means your body can start making vitamin D properly after months where it simply couldn’t, no matter how long you were outside. And that changes more than most people realise.

Throughout winter, the sun sits too low in the UK sky for UVB to do its job. You can be out walking, getting fresh air, doing all the “right things”… and still not be producing or storing vitamin D.

But now it can!

Vitamin D Is Not Just a Vitamin – We still call it vitamin D, but in reality, it behaves much more like a hormone.

Once it’s produced in the skin, it influences a wide range of systems from immune function and inflammation, to mood, metabolism, and how the body handles minerals like calcium.

It’s not just supportive. It’s instructive.

It tells the body what to do, when to do it, and how strongly to respond.

Which is why, after months of low light, things can start to feel a little off. Energy dips. Mood shifts. Hormones lose their rhythm slightly. Then the light changes… and the signal comes back.

Skin Makes It. Eyes Set The Rhythm. Your skin making vitamin D is the well-known part. But there’s another layer to this that matters just as much.

Light also enters through the eyes, where it’s read by the brain and used to set your internal clock – your circadian rhythm. This is what helps organise the timing of hormone release, sleep-wake cycles, and overall daily rhythm.

So when you’re outside in natural light, with both skin and eyes exposed, your body isn’t just producing vitamin D in isolation.

It’s receiving a coordinated message.

Make the hormone.

Time it properly.

Run everything else in sync with it.

And when that happens consistently, things tend to feel a lot more stable.

Why This Matters Now – Modern life has quietly pulled us away from this without us really noticing. We spend most of our time indoors. Light is filtered through glass. Days are spent under artificial lighting, and when the sun does appear, we often shield ourselves from it out of habit.

So even when the signal becomes available again in spring, we don’t always fully receive it. Which means the body is still, in many ways, running on winter settings.

What We Come Back To With Clients – In clinic, people often arrive looking for more complex answers and sometimes they are needed. But just as often, we come back to this.

Light. Timing. Rhythm. Because vitamin D isn’t just about a number on a test result. It reflects whether the body is consistently receiving one of its key environmental signals.

When that signal is missing, systems can drift. Hormonal patterns become less stable, energy feels inconsistent, and things don’t quite land as they should.

When the signal returns, even in a simple and consistent way, the body often begins to organise itself again.

You don’t need to overthink this.

Just step outside around the middle of the day, when UVB is actually present roughly between 11am and 3pm.

Roll your sleeves up.

Show a bit of leg.

Let your skin take in the light.

And let your eyes adjust to natural daylight as well (without staring directly at the sun!).

Take a break sunglasses & and contacts.

Just a few minutes of proper exposure, done regularly.

And if you want your body to make the most of that signal, make sure your mineral foundations are there too- especially magnesium, which plays a key role in how vitamin D is activated and used in the body.

And if nothing else… it’s a pretty good excuse to get out in the fresh air ☀️

Vitamin D Is Not Just a Vitamin – We still call it vitamin D, but in reality, it behaves much more like a hormone.

Once it’s produced in the skin, it influences a wide range of systems from immune function and inflammation, to mood, metabolism, and how the body handles minerals like calcium.

It’s not just supportive. It’s instructive.

It tells the body what to do, when to do it, and how strongly to respond.

Which is why, after months of low light, things can start to feel a little off. Energy dips. Mood shifts. Hormones lose their rhythm slightly. Then the light changes… and the signal comes back.

Skin Makes It. Eyes Set The Rhythm. Your skin making vitamin D is the well-known part. But there’s another layer to this that matters just as much.

Light also enters through the eyes, where it’s read by the brain and used to set your internal clock – your circadian rhythm. This is what helps organise the timing of hormone release, sleep-wake cycles, and overall daily rhythm.

So when you’re outside in natural light, with both skin and eyes exposed, your body isn’t just producing vitamin D in isolation.

It’s receiving a coordinated message.

Make the hormone.

Time it properly.

Run everything else in sync with it.

And when that happens consistently, things tend to feel a lot more stable.

Why This Matters Now – Modern life has quietly pulled us away from this without us really noticing. We spend most of our time indoors. Light is filtered through glass. Days are spent under artificial lighting, and when the sun does appear, we often shield ourselves from it out of habit.

So even when the signal becomes available again in spring, we don’t always fully receive it. Which means the body is still, in many ways, running on winter settings.

What We Come Back To With Clients – In clinic, people often arrive looking for more complex answers and sometimes they are needed. But just as often, we come back to this.

Light. Timing. Rhythm. Because vitamin D isn’t just about a number on a test result. It reflects whether the body is consistently receiving one of its key environmental signals.

When that signal is missing, systems can drift. Hormonal patterns become less stable, energy feels inconsistent, and things don’t quite land as they should.

When the signal returns, even in a simple and consistent way, the body often begins to organise itself again.

You don’t need to overthink this.

Just step outside around the middle of the day, when UVB is actually present roughly between 11am and 3pm.

Roll your sleeves up.

Show a bit of leg.

Let your skin take in the light.

And let your eyes adjust to natural daylight as well (without staring directly at the sun!).

Take a break sunglasses & and contacts.

Just a few minutes of proper exposure, done regularly.

And if you want your body to make the most of that signal, make sure your mineral foundations are there too- especially magnesium, which plays a key role in how vitamin D is activated and used in the body.

And if nothing else… it’s a pretty good excuse to get out in the fresh air ☀️