Here is how we research, write, review and update every guide and article, so you can judge how far to trust it.
You can judge how far to trust a page by following the same steps we do.
We start with respected sources. These include guidelines from the World Health Organization and the Centers for Disease Control and Prevention, national health services such as the NHS, the US National Institutes of Health, and peer-reviewed studies indexed on PubMed.
We link to sources on the page, so you can read them yourself.
Our Health Research Writer, Dharshini Neelakandan, turns research into plain language.
Meena Narayanan, a Certified Personal Trainer (CPT), reviews our content for accuracy, clarity and safety before it is published.
A CPT is a fitness credential. Her review does not replace review by a doctor, dietitian or mental health professional, and we do not claim it does.
AI tools may be used to help organize research and improve readability. Every article is researched, written, fact-checked and reviewed by humans before publication.
AI does not replace our editorial or review process.
Each page shows when it was published and when it was last updated. We change the update date only when we make a real change.
We revisit pages when guidelines change or when readers point out problems.
If you find an error, tell us. We check it against our sources, fix confirmed errors and update the page date.
Advertising and product sales may help pay for this work. They never change what we recommend. Read more on our About page and disclaimer.
Every page names its writer and its reviewer.
Meet our writer and reviewer, or read about HSW.
Tell us the page and what to check. We verify it against our sources and fix confirmed errors.
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