About Us

Vitamin D Test is an Australian service built around a single idea: knowing your vitamin D level shouldn't take a half-day off work. Lab-grade analysis, posted to your door, no doctor's appointment or pathology trip required.

Who we are

Vitamin D Test is an Australian-operated direct-to-consumer testing service. Our test kit is manufactured in Australia and registered with the Therapeutic Goods Administration (ARTG 526367). Customer service, invoicing, kit shipping and reply-paid returns are all run from Australia.

Our analytical work is performed through a partnership with Masdiag, an specialist in LC-MS/MS clinical mass spectrometry. Masdiag has spent the last decade focused on one thing: doing micronutrient analysis better than the immunoassay-based testing that dominates the cheap end of the market.

The partnership gives Australian customers something rare: the kind of analytical chemistry and quality assurance infrastructure you'd normally only encounter through a doctor's referral to a major hospital pathology service, packaged into a simple at-home finger-prick test with a plain-English report.

Why we exist

In Australia, vitamin D testing through the public health system is available, but with strings attached. The Medicare rebate for vitamin D testing was significantly tightened in 2014 — testing volume had exploded to over 4 million tests a year and the government restricted bulk-billing to specific clinical indications: suspected osteoporosis, pregnancy, chronic kidney disease, prolonged immobility, certain medications, and a handful of other defined criteria.

What that means in practice: if you don't tick one of those boxes, your GP can still order the test — but it won't be bulk-billed, and you'll pay $30–60 out of pocket at most pathology clinics. Even when you do qualify, getting it done still means booking a GP appointment (often with a gap fee these days), getting a referral, driving to a pathology clinic, waiting for the blood draw, waiting days for results, and possibly going back to the GP to discuss them. For most healthy Australians who just want to know their number — to optimise supplementation, plan for winter, or simply check that everything's where it should be — that's a half-day commitment minimum.

For a lot of people, that friction is the reason it never happens at all.

At the same time, the home vitamin D testing options that have appeared in pharmacies use immunoassay technology that's been known for years to over-estimate vitamin D by 10–20%, miss the D₂ form entirely, and produce categorical "low/normal/high" results rather than the actual numbers that matter clinically. Even some lab-analysed home test services use immunoassay platforms — faster and cheaper than mass spectrometry, but less accurate.

So you ended up with three tiers: the highly accurate methods that hospitals use (inaccessible unless you tick a Medicare box), the convenient home tests (not very accurate), and a $30–60 self-funded pathology bill if you wanted to do it properly without the Medicare paperwork.

Vitamin D Test exists to close that gap. Same gold-standard method the reference labs use. Same validation discipline. Same precision. Available directly to anyone in Australia who wants to know their vitamin D status, posted to their door, no doctor required, no half-day off work.

Our analytical partner

Masdiag is our analytical partner. Their R&D and methodology team has published 30 peer-reviewed scientific papers on LC-MS/MS dried blood spot methodology and vitamin D metabolite analysis, with a cumulative Impact Factor of 143 and an average IF of 7.14 per paper. The foundational method publication for the exact assay your sample is analysed with appears in Analyst, 2019.

This matters in practice because the analytical method behind your result isn't proprietary marketing — it has been independently peer-reviewed and is on the public record. If your GP, naturopath, or specialist wants to verify what the test actually does, they can read the papers.

How we work

Four principles that shape every part of our service.

What we don't claim

Honest framing matters. Here's what we deliberately don't claim:

• We don't diagnose or treat anything. A vitamin D test result is one input among many that your GP would use to assess your overall health. We report numbers; clinical decisions are your doctor's.
• We don't claim to prevent disease. Adequate vitamin D supports a range of physiological systems — that's established science. But "supports" is not the same as "prevents," and we won't pretend otherwise.
• We don't claim our test is regulated as a medical device for diagnosis. Our kit is TGA-registered as a sample collection device (ARTG 526367). The analytical service is an informational testing service.
• We don't claim our results are a substitute for a GP consultation. If you have symptoms, see a doctor. If your result is clinically significant, see a doctor.

Where we're based

Suite 2080, 112 Snell Grove, Oak Park VIC 3046, Australia. Customer service, invoicing, kit manufacturing, kit shipping and reply-paid returns are all handled from Australia.

Phone: +61 423 408 561 · Email: info@vitamindtest.com.au

Sample analysis is performed by our analytical partner Masdiag and a method certified through the Vitamin D External Quality Assessment Scheme (DEQAS) — the international quality assurance programme that benchmarks vitamin D laboratories worldwide against certified reference standards.