The Biomarkers Australians Are Most Interested In (2026)

How we built this index

This index draws on two sources. The first is public search demand: for each biomarker we combined the Australian monthly search volume for the marker and its common blood-test terms, using Semrush data for 2026. The second is our own experience. As a private testing service that has facilitated testing for more than 5,000 Australians, we see first-hand which markers people choose, ask about and come back to. Where those two lenses agree, the signal is strong, and on these markers they agree closely.

One important note: these figures reflect interest and demand, not medical importance. A biomarker being popular does not mean it is right for you, and this article is general information, not advice.

The 2026 Biomarker Interest Index

Here are the 20 biomarkers Australians search for most, ranked by combined monthly searches.

The spread is the real story: Australians are not just checking cholesterol and blood sugar, they are researching inflammation, iron stores, hormones, kidney and liver function and the newer heart-risk markers. Here is what stands out cluster by cluster.

Metabolic markers lead the pack

HbA1c (average blood sugar over three months) is one of the single most-searched biomarkers in the country, reflecting rising awareness of prediabetes, insulin resistance and the wave of interest in weight-loss medication. Uric acid also ranks highly, driven by gout and metabolic health. This is the cluster where curiosity most often turns into testing.

Heart interest goes far beyond cholesterol

This is the most striking finding, and it matches exactly what we see in our own testing. Australians are clearly moving past the basic cholesterol check: CRP (an inflammation marker), triglycerides, homocysteine, lipoprotein(a) and ApoB all draw serious search volume, and they are among the markers our customers increasingly choose. These are the markers cardiologists point to for a fuller picture of heart risk, and the public is catching on. If your knowledge of heart testing stops at LDL and HDL, the data says Australians are already ahead of you.

Hormones: testosterone and thyroid lead

Among hormone markers, testosterone and thyroid (TSH) dominate the interest. Testosterone searches span everything from how to check your levels to what is normal by age, while thyroid interest is driven by fatigue, weight and mood symptoms that send people looking for answers. Cortisol, the stress hormone, rounds out the top 20, a sign of how mainstream the conversation about stress and burnout has become. Explore the full range under hormone blood tests.

Iron, nutrients and fatigue

Ferritin (your iron stores) is a top-five biomarker, and Vitamin B12 is the single most-searched marker on the list. Together with folate, vitamin D and haemoglobin, they point to one dominant question Australians are trying to answer: why am I so tired? Fatigue is one of the biggest drivers of health searches, and these markers are where people look first.

Kidney, liver and the quiet essentials

Creatinine, eGFR and GGT all rank in the top 15, which is notable because these are not glamorous markers, they are the quiet essentials of organ function. Their popularity suggests Australians increasingly want a full picture of how their body is working, not just a single number. You can explore these across our blood test categories, including a full liver function test.

What we see at MediTests

The search data lines up closely with what we see in practice, and that overlap is the point. After facilitating testing for more than 5,000 Australians, the same markers come up again and again. Beyond the mainstream checks, we see strong and growing interest in the markers that show where Australian health awareness is heading: lipoprotein(a) and ApoB for a truer read of heart risk, homocysteine, PSA for men, thyroid, and testosterone. These are not the tests a standard check-up usually includes, which is exactly why Australians come looking for them.

The questions people ask are almost always the same three: what does this number mean, is it normal for me, and what should I do about it. When the national search trends and what we see across thousands of tests point to the very same markers, it is a clear signal of what the country genuinely wants to understand about its health, and it is why we build a plain-English guide for every major biomarker.