In the age of viral nutrition claims and influencer advice, being able to evaluate research yourself is a superpower. Here's how to read nutrition studies critically.
Types of Studies
- Randomized Controlled Trials (RCTs): Gold standard. Participants randomly assigned to intervention or control. Best for establishing causation.
- Cohort studies: Follow groups over time. Good for observation but can't establish causation.
- Case-control studies: Compare people with and without a condition. Retrospective, subject to bias.
- Animal studies: Useful for mechanistic understanding but don't directly apply to humans.
Red Flags
- Studies funded by companies with vested interests
- Extremely small sample sizes
- Headlines that contradict the actual data
- Single studies presented as definitive
- Conflicting interests of the researchers
What to Look For
- Was the study peer-reviewed?
- What's the sample size?
- Has it been replicated?
- What do systematic reviews and meta-analyses conclude?
- Does the conclusion match the media headline?
