Home
Contemporary Scandinavian architecture of stone and glass above a Norwegian fjord, with snow-covered mountains beyond

Evidence Review

How to read a health claim without being misled

All insights
7 min readPublished 30 June 2026

Relative risk, absolute risk, associations and causes. A short field guide to reading prevention marketing with a clinical eye.

Health marketing lives on a specific trick: quoting the relative risk reduction without the absolute. “Reduces your risk by 40%” can describe a decline from 4% to 2.4% — meaningful at population scale, modest for one person. Both numbers are true; only one is useful to you.

The second pattern to watch is the association dressed as cause. “People who X live longer” does not mean X causes longer life — the people who X may differ in a dozen other ways. Randomised evidence is the dividing line, and it is worth asking which side any claim falls on.

Key points

  • Always ask for the absolute risk, not just the relative.
  • Ask whether the evidence is observational or randomised.
  • Be sceptical of biomarkers sold before they are validated.

This is the lens we apply to our own communications. It is also why we can tell you, without hedging: we do not promise longevity. Anyone who does is quoting marketing, not medicine.

Nordic Quantified Editorial · These articles are editorial content, not medical advice. They do not create a physician–patient relationship. Consult a qualified physician about your personal situation.

Contemporary Scandinavian architecture of stone and glass above a Norwegian fjord, with snow-covered mountains beyond