What it means
Cohort and case-control studies are common in nutrition and aging research. They can suggest links but cannot prove cause, because people who take a supplement often differ in other ways, a problem called confounding.
Much nutrition research is observational, so headlines about foods and health usually need a trial to back them up.
Also known as
- cohort study
- case-control study
- cross-sectional study
- association study
Sources
General information, not medical advice. Talk to a clinician about any decision about your health.