Read beyond the headline.

A nutrition headline is an invitation to read further. Start with the question the researchers asked and the kind of study they conducted. An association between a dietary habit and a health outcome does not, on its own, establish that one caused the other.

Observational studies follow patterns without assigning an intervention. A well-designed randomized controlled trial assigns participants to different groups and can offer stronger evidence about cause and effect. Each design has limits; the design should match the question being asked.

Next, look at who participated, how many people were included and what was measured. NCCIH notes that small studies are more likely to produce findings due to chance or inconclusive results. A larger sample can improve reliability, but size alone does not resolve every weakness in a study.

Read the discussion as carefully as the conclusion. Consider the authors’ stated limitations and whether the finding applies to the population you have in mind. Keeping uncertainty visible makes a scientific finding more useful: it helps distinguish what the study supports from the questions that remain open.