What These Guides Are For
Our tests give you a result. These guides help you decide what that result is worth and what to do with it. Each one answers a single question, says what the research does and does not show, and links to the tests it talks about.
How We Write Them
- One question per guide. If a topic needs two answers, it becomes two guides.
- Checked facts. We check every research claim against the published paper before it goes on the page.
- Honest limits. Where the evidence is weak or mixed, we say so.
- No diagnosis. Nothing here replaces advice from a qualified professional.
Read more about how we build and review our tests.