What a scientific study can—and cannot—show
A finding needs its methods, scale and uncertainty. One promising study is a piece of evidence, not the entire answer.
Does the study show association or causation?
An association means two things varied together in the observations. That alone does not establish that one caused the other. Check the study design and whether the report separates these claims.
Who or what was studied?
Look at the sample size, methods and limitations. Findings in a particular group, an animal experiment or a laboratory setting may not answer the same question for a different population.
How large and uncertain is the finding?
A striking percentage needs the underlying scale and context. Statistical significance should not be presented as proof that a finding is important in practice. Read limitations alongside the headline result.
What should I check before sharing?
Find the original study or official report. Check what was measured, what remains uncertain and how the result fits the broader evidence. This guide helps interpret reporting; it is not personal medical advice.
Read the official explanation
Source for this background guide: National Institutes of Health ↗. This guide explains definitions and interpretation; it does not provide a current data release.
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