A shared screenshot is a starting point for checking the source.
Go back to the original
Look for the organisation or author behind a document. Where possible, read the original publication rather than a cropped image or someone else’s summary. Check for a publication date, updates and links to supporting evidence.
Understand the purpose
Ask who pays for the information and whether it aims to inform, sell or persuade. Attractive presentation and confident language do not establish reliability.
Record what is missing
Keep a short note of unanswered questions. If you cannot establish authorship, date or supporting evidence, retain that uncertainty when discussing the document. Compare its claims with other reliable sources.
Read the original source
MedlinePlus — evaluating health information ↗ (opens in a new tab)
These guides explain research concepts. They do not provide individual medical advice or establish the status of any particular product.