Journal
Plain-English science on vitamin D, deficiency, testing methods, and what your number actually means.
ImmunityVitamin D and immunity: what the research actually shows
Every immune cell carries a vitamin D receptor — which is why low levels are linked to more frequent respiratory infections. Here's what the evidence actually...
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ComparePharmacy rapid vitamin D tests vs lab-based testing: what's the difference?
Pharmacy rapid tests are cheap and quick — but they're not measuring vitamin D the same way a lab does. Here's what the difference actually means...
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How it worksHow to take vitamin D supplements: timing, dose, and what to take it with
Vitamin D is fat-soluble, which changes how and when you should take it. Here's the practical guide — D2 vs D3, with food or empty stomach,...
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AustraliaFoods high in vitamin D (and why food alone probably isn't enough)
Wild salmon, sardines, egg yolks, UV-exposed mushrooms — the natural food sources of vitamin D are short and oily. Here's the realistic contribution food can make...
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AustraliaHow much vitamin D do you actually need? An Australian guide
There's no single right answer to "how much vitamin D do I need" — it depends on your blood level, your age, your sun exposure, and...
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AustraliaWhy so many Australians are vitamin D deficient (even in summer)
Roughly 1 in 4 Australian adults has insufficient vitamin D. The reasons are part geography, part lifestyle, and part the very public health messaging that protects...
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The whole process takes less time than booking a GP appointment — and tells you more about your vitamin D than a standard blood test.