Vitamin D3 – More Than Just the “Sunshine Vitamin”
- sara6297
- Sep 29
- 3 min read
By the time October rolls around, most of us in the UK are no longer making meaningful amounts of vitamin D from the sun. And yet, this little nutrient quietly influences almost every system in the body. It’s not just about bones — it’s one of the most powerful regulators of the immune system, hormones, and even the brain.
When vitamin D3 is low, your immune cells don’t “switch on” properly. That’s why people often notice more coughs, colds, and lingering infections through the darker months. Vitamin D also calms unnecessary inflammation, supports mood balance, and plays a role in protecting the heart and blood vessels.
The problem is, our modern lives stack the odds against us:
We spend far more time indoors than our ancestors ever did.
Food sources of vitamin D are limited (oily fish, egg yolks, mushrooms).
Soil depletion and food chemicals mean even “healthy diets” often fall short.
My advice:
Choose a good quality, third-party tested Vitamin D3 supplement, ideally at a meaningful daily dose of 10,000 IU in winter.
Pair it with Vitamin K2, which helps guide calcium into the bones and teeth (instead of letting it clog up arteries).
Where to find Vitamin K2 naturally?
Fermented foods like natto (a traditional Japanese soybean dish, the richest source by far).
Aged cheeses like gouda and brie.
Grass-fed butter and dairy.
Egg yolks from free-range organic hens.
Organ meats (liver is particularly good).
These can do the job along with the D3.
Naturopathic Insights Into Vitamin D3
It acts like a hormone: Vitamin D3 is more of a hormone than a vitamin, with receptors in nearly every cell of the body — influencing everything from immune defence to mood regulation.
It links to serotonin: Low vitamin D is associated with low serotonin (the “feel good” neurotransmitter), which is why deficiency often shows up as low mood or “winter blues.”
It balances the immune system: D3 doesn’t just boost immunity, it regulates it — helping prevent the overactive immune responses seen in autoimmunity and chronic inflammation.
It pairs beautifully with magnesium: Magnesium is a co-factor needed to activate vitamin D. Without enough magnesium, you won’t utilise D3 properly.
It supports mitochondria: Studies show vitamin D improves mitochondrial function (your energy factories), which is why fatigue is a common symptom of deficiency.
And here’s where it ties back to the bigger picture:
In my Mind Protocol, vitamin D3 is foundational for mood and nervous system balance — low levels are strongly linked to anxiety, depression, and that “flat” feeling so many get in the darker months.
In my Cholesterol Protocol, vitamin D3 is equally vital for cardiovascular health — regulating inflammation, influencing blood pressure, and improving how cholesterol is used in the body.
Whether your focus is emotional resilience, clear thinking, or long-term heart health, Vitamin D3 (with K2) is one of the simplest, most powerful steps you can take this winter.
If you’re looking for a reliable source of vitamin D3 and K2 I always suggest choosing practitioner-grade supplements. I will share the link below. These are independently tested, potent, and free from unnecessary fillers — so you know you’re getting exactly what your body needs. Here is my discount code: SACI5
The Natural Dispensary Link:
Vitamin D3 - https://naturaldispensary.co.uk/?query=BA-120050
I would love to here from you book a free discovery call available via the link below.