Persistent fatigue has biological causes across multiple systems. 80+ biomarkers. Doctor-led. An explanation you can act on.
Campaign partnerCampaign partnerCampaign partnerYou sleep enough. You eat well enough. You still can’t get through the afternoon without a wall.
You turn down plans because you already know how you’ll feel by 7pm.
There’s a morning you wake up tired, and you wait for it to pass, but it just doesn’t.
Recovery used to be overnight. Now it’s the whole weekend, and that’s become normal.
It’s probably just stress. Or sleep. Or the fact that you haven’t exercised properly in months. It’s always something.
You don’t bring it up anymore. Everyone’s tired. What’s the point.
Which is why it rarely gets one answer.
Why you feel the way you do
What you’re feeling doesn’t come from one place. The afternoon wall, the slow recovery, the sleep that doesn’t restore you. They sit at the intersection of two or three biological systems, and they affect each other.
Your body converts food into fuel through a chain of reactions that depend on iron, B12, thyroid function, and blood glucose working together. Iron carries oxygen to your cells. B12 drives the conversion process. Thyroid hormones set the speed the whole system runs at. When one underperforms, the others compensate until they can’t. Hormonal decline makes it worse: falling testosterone and oestrogen change how efficiently your body produces and uses energy, which is why fatigue and hormonal shifts so often arrive together.
Testosterone, oestrogen, and progesterone regulate energy production, sleep depth, and cellular repair in both men and women. They decline with age at different rates, and the balance between them matters as much as the individual levels. When they fall out of balance, your sleep architecture changes, your recovery slows, and your inflammatory load rises. The effects compound across systems.
CRP and other inflammatory markers measure how hard your immune system is working in the background. Chronic low-grade inflammation diverts metabolic resources away from energy production, cognitive function, and tissue repair. Poor sleep drives inflammation up. Hormonal decline does the same. When all three systems are involved, everything feels harder but nothing is clinically wrong.
0%
of Australian employees experienced fatigue in the past year, but most never raised it with a doctor or investigated the cause.
Sonder, State of Employee Health and Wellbeing Report, 2026. n=6,105.
0 in 10
Around one in ten adults has a thyroid issue affecting their energy, metabolism, or mood. Most don’t know, because it’s subclinical. Present enough to feel, but not flagged on a standard test.
Chaker L et al., Lancet, 2017; Hypothyroidism in Context, Advances in Therapy, 2019.
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Professionals are almost twice as likely to experience fatigue as the general population. The higher the demands of the role, the higher the rate.
Yoon JH et al., Frontiers in Public Health, 2023. Meta-analysis, n=623,624.
Real patients
Find out what’s actually going on..
Built on The 6 Systems™. Doctor-led. Australian-registered.
We have the answers
Fatigue is a symptom, not a diagnosis. It can involve multiple biological systems at once, which is why investigating one marker at a time rarely explains what’s going on.
$1,295. Includes pathology, a clinical report, and an extended doctor consultation via telehealth. No hidden fees.
A standard blood test checks whether you’re within the reference range for a handful of markers. It’s designed to detect disease. Fatigue often involves several systems interacting. A single doctor reviewing 80+ biomarkers together, in one assessment, can see patterns that separate tests over separate visits don’t.
80+ biomarkers across six biological systems, assessed in a single panel. One doctor reviews everything before your consultation, with the clinical tools to act on what they find.
No. Your GP manages disease, acute care, and general health. VitalYOU investigates the biological systems that drive how you feel and perform day to day.
VitalYOU is designed for persistent fatigue that hasn’t been adequately explained, not for managing diagnosed conditions like CFS/ME. If you have a confirmed diagnosis, we’d recommend working with a specialist in that area.
Most supplements are chosen based on guesswork, not blood work. If you’ve tried magnesium, iron, B vitamins, or adaptogens and nothing changed, it’s likely not that supplements don’t work. It’s that you didn’t know which ones you needed first. Your panel, your intake answers, and your doctor consultation together tell you what’s actually worth taking.
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