Common Signs You Might Be Low on Vitamin D

Vitamin D isn’t just a sunshine vitamin — it’s a foundational player for healthy bones, muscles, and your immune system. Yet, low vitamin D symptoms can be surprisingly subtle and easy to ignore until they snowball.

People commonly notice:

- Persistent fatigue that sleep doesn’t fix
- Frequent colds or infections
- Muscle aches and bone discomfort
- Mood swings or feelings of low mood, especially in winter
- Slow wound healing

Women, in particular, can experience low vitamin D symptoms more keenly due to hormonal factors and bone density shifts over time.

When It’s More Than Just a Mild Deficiency

Severe vitamin D deficiency symptoms can develop if low levels are left unchecked. These can include:

- Noticeable bone pain or fragility
- Muscle weakness that affects daily activities
- Higher risk of fractures
- Chronic fatigue or depression

In adults, untreated deficiency can quietly impact heart health and immune resilience. This is why many Australians consider targeted vitamin D3 + K2 supplements as a practical daily insurance policy.

Weird Symptoms? You’re Not Alone

There’s a reason vitamin D is often overlooked: its symptoms can feel vague or mimic other common health complaints. Some people report:

- Hair loss or brittle nails
- Unexplained back pain
- Low energy and poor concentration
- Restless sleep

These “weird” signs often pop up alongside more familiar issues like low immunity and bone tenderness.

Foods High in Vitamin D (and Why It’s Often Not Enough)

Sure, you can get vitamin D naturally — but here’s the catch: modern indoor lifestyles mean less sun exposure. Plus, few foods naturally contain enough vitamin D to maintain optimal levels.

Some good sources include:

- Oily fish like salmon, sardines and mackerel
- Egg yolks
- Fortified dairy products
- Some mushrooms grown under UV light

But even with a balanced diet, dietitians often recommend a supplement, especially through winter months.

Why We Use Switch Nutrition's Vitamin D3 + K2

At Citadel Health Store, we’re picky about what makes it onto our shelves — and Switch Nutrition's Vitamin D3 + K2 checks every box.

It combines premium Vitamin D3 (cholecalciferol) with Vitamin K2 (menaquinone 7) — a smart combo that supports calcium being absorbed and properly directed to bones and teeth.

This helps minimise unwanted calcium build-up in arteries, an important edge that D3 alone doesn’t offer.

It’s clean, vegan-friendly, and free from unnecessary fillers — just pure daily support for bone strength, immunity, and cardiovascular health.

In short: it’s effective, trustworthy, and designed for modern Australian lifestyles.

Frequently Asked Questions

Q: What are the signs of vitamin D deficiency in adults?
Common signs include low energy, muscle aches, frequent colds, and low mood.

Q: Can low vitamin D cause fatigue?
Yes. One of the most reported symptoms of low vitamin D is constant tiredness or fatigue that rest doesn’t resolve.

Q: Do I still need to get sun if I take vitamin D3?
A supplement helps, but healthy sun exposure supports natural vitamin D production. Both can work hand in hand.

Q: Why is K2 included with D3?
K2 ensures the calcium absorbed by D3 is properly used by your bones and teeth, and not deposited where it shouldn’t be.