Editorial Policy

Hair loss is a health topic, and bad information costs people money, time and hair. These are the rules every article on this site follows.

Sources

We base health claims on peer-reviewed research: clinical trials, systematic reviews and meta-analyses, and clinical guidelines from dermatology bodies. We link to the original source (usually PubMed or the journal) at the end of every article, and we prefer recent, larger and better-controlled studies over small or older ones. We don’t cite other blogs or marketing material as evidence.

Evidence ratings

Articles about a specific treatment carry an evidence rating:

• Strong evidence: supported by multiple randomized controlled trials or meta-analyses.
• Moderate evidence: supported by some controlled studies, with limitations such as small samples or short follow-up.
• Weak evidence: only small, uncontrolled, early or self-reported studies. Promising at best.
• Insufficient evidence: no reliable human studies yet.

A weak rating doesn’t mean something doesn’t work. It means nobody has shown well enough that it does.

How articles are written and updated

Articles are researched and drafted with the help of AI tools, then checked by a person before publishing: every claim against its cited source, and every source to confirm that it exists and says what we say it says. We review our most-read articles regularly and whenever important new research appears, and the date at the top of each article shows when it was last updated.

Medical review

Articles reviewed by a medical professional are marked “Medically reviewed by” with a link to the reviewer’s profile. Nothing on this site replaces a consultation with a doctor or dermatologist.

Commercial relationships

We earn money through affiliate links, advertising and introductions to clinics. Commercial partners never see or approve our content before publication, and how much a partner pays doesn’t affect our ratings. See our affiliate disclosure.

Corrections

Found a mistake? Tell us. We fix factual errors promptly and note significant corrections in the article.