A study is evidence. It is not a permission slip to stop asking questions.
1. What was the question?
Look for the exact question the researchers set out to answer. A study designed to measure a marker, a safety outcome, or a specific formulation cannot automatically answer every broader question a headline might suggest.
2. Who was studied?
Participants, sample size, age range, health status, and context all matter. A result in a small, specific group may be interesting without being universally transferable.
3. What was compared?
Was there a placebo, a comparison group, or another intervention? A comparison is often what helps put a result in context. Without one, it can be difficult to know what changed and why.
4. What was actually measured?
Read past the conclusion to the outcomes and time frame. A study can be well done and still answer a narrow question. That is normal; it is why single studies rarely close a whole topic.
5. Where does it fit?
One paper is part of a larger conversation. Systematic reviews can be useful because they assess multiple studies, their methods, and the risk of bias together.