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Understanding Testing

Reference ranges, the difference between abnormal and unwell, and the traps that make people act on numbers that do not mean what they appear to mean.
Laboratory data being reviewed on screen.
Understanding Testing

How to read a blood test result

In range is not the same as optimal, out of range is not the same as unwell, and one flagged marker on a panel of forty is expected. A guide to not misreading your own results.

8 min read
Understanding Testing

Why two labs give you different ranges

The same sample can be in range at one laboratory and out of it at another. That is not an error — it is how assays work, and it matters when comparing results.

5 min read

Keep reading

The library covers testing, hormones and the foundations that move them, without pushing you toward a purchase at the end of every paragraph.

Blood tests and supplements only. We do not sell prescription medicines.