Which health claim in the news deserves a closer look at its evidence?

Every week brings a new health claim: a food that helps, a habit that harms, a screening that saves lives or does not. Some are well supported; others rest on a single small study or on a misreading of the evidence.

We are asking readers to pick one claim they have seen and examine it. A good answer would state the claim, find the original study, not just the news story, say what kind of study it was, how many people were involved, what was compared, and what the authors themselves say are the limits. Then say whether other studies agree, with reference to systematic reviews where available.

The point is not to tell others what to do about their health. It is to practise reading evidence carefully, and to share a worked example that others can learn from.

Please avoid giving personal medical advice; if the claim affects a decision you face, talk to a health professional.