Bloods and biomarkers

What your baseline bloods can tell you

A guide to the tests that make up a baseline, and why measuring before acting changes the conversation with your doctor.

6 min readMedically reviewed by [DOCTOR NAME], AHPRA [REG NUMBER]Last reviewed [DATE]
Illustration: a blood drop pointing proudly at a rack of sample tubes
Key takeaway

A baseline is a reference point. Its real value comes from comparing future results against it, with a doctor who knows your history.

Why start with a baseline

Most people only have blood tests when something already feels wrong. A baseline flips that around. It records where you are while you are well, so small changes later stand out against your own normal rather than a population average.

What a baseline usually covers

Your doctor chooses the tests, but most baselines look at four groups: metabolic markers such as blood sugar and insulin, heart markers such as cholesterol and ApoB, hormone markers chosen for your age and sex, and general health markers such as a full blood count, iron, liver and kidney function.

In range does not always mean ideal

Reference ranges describe where most people's results fall. A result can sit inside the range and still be worth watching, especially if it is moving over time or sits alongside other signals. That is why results are read by a doctor, not just flagged by a computer.

What happens next

Your doctor goes through every result with you, explains what matters and what doesn't, and sets a plan. Sometimes that plan is simply to retest in six months. Sometimes it is a change in training, nutrition or sleep. Treatment is only one option, and never the default.

This guide is general information only and doesn't replace advice from your own doctor. If you have symptoms or concerns, speak to a health professional. In an emergency, call 000.

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