Affiliate Disclosure

How this site is funded

Revenue comes from two sources: our own digital guides and workbooks, and — where noted — a small commission on books we recommend through retailer affiliate links. That is the complete list.

What we refuse

• Paid placement in articles, and sponsored content of any kind.
• Display advertising.
• Commissions from treatment providers, clinics, supplements or devices.
• Any arrangement that would give a company influence over an evidence label.

Our own products

When we mention our own guides inside an article, they are identified as ours. An article is never written to sell a product, and no product recommendation changes what the research section says.

Book links

Where a book link earns a commission, the recommendation reflects the same standard we apply to research: we say what a book is good for and where it overstates its case, including for books we earn from.

If you spot a conflict

Tell us. If a commercial relationship appears to have shaped our editorial judgement, we want to know before a reader has to point it out twice.