The evidence behind every video
Should I Worry? explains common symptoms with clear animation and sorts the harmless from the signs that need a doctor. Every claim is referenced to research or published guidelines, or labeled as expert opinion where no single study applies, and every script is checked by a doctor before release. Here you can see exactly which study backs which sentence.
Episodes
- The Back Pain That Can Kill You
E01 · 10 Nov 2026 · 42 claims, 23 sources
How we check the evidence
We use peer-reviewed research and published guidelines only; news articles, blogs and influencer content don't count as evidence. Each claim is labeled with the strongest kind of evidence behind it:
- Guideline / systematic review
- official guidance, or a study that pools every good study on the question
- Randomized trial
- people put into groups by chance, so differences are most likely due to the treatment
- Observational study
- researchers watched what happened without assigning treatment; weaker evidence
- Expert opinion
- textbook knowledge or clinical consensus with no single study behind it; weakest evidence
Where the evidence is weak or experts disagree, the video says so. If a claim turns out to be wrong, we correct it in a pinned comment, in the video description and on that episode's page here.
About
General education, not medical advice for you. We can't advise on individual cases. If you're worried about your symptoms, see a doctor; in an emergency, call your local emergency number.