Understand your health numbers.

Helping you understand blood tests, health calculators and common health conditions through clear, evidence-based education.

Hi, I'm Rua. Your personal health mathematician.

Meet Rua

Your friendly fox health guide — not a doctor, just here to help you learn.

Blood Test Checker

Enter a single lab value and see where it sits against your reference range.

Metric or imperial, with clear category and educational context.

Plain-language explanations of common markers, from Haemoglobin to eGFR.

Plain-language guides across conditions, nutrition and more.

Iron deficiency, thyroid, diabetes and more.

Iron, B12, magnesium, omega-3, fibre…

Cycles, fertility, pregnancy, menopause.

Testosterone, PSA, heart, metabolism.

Cholesterol, blood pressure, risk.

How to read your report, ranges, questions.