The short version
This site uses Google Analytics to count visits and to see which pages get read. It sets cookies in your browser and it tells Google that a visit happened. That is a change: until September 2026 this site ran no analytics at all, and this policy said so in plain terms, so we would rather point at the change than let you find it. Our Analytics property is also linked to our Google Ads account, so Google Ads can tell us which ad clicks led someone to the contact page or to send the form. A second change followed in October 2026: we now advertise on Instagram and Facebook, and a handful of pages run Meta’s advertising pixel so we can tell whether those ads bring anyone here. Since October 20, 2026 it runs on every page of the site, the journal and the condition and lab pages included. For two days in October 2026 we tried a lighter touch: the contact form asked before Meta was told about an inquiry, then Meta was told nothing at all, and your browser’s Global Privacy Control signal switched off every third-party measurement here. From October 17, 2026 that is reversed, and we would rather say so than let you find it: everything described below runs for every visitor, Meta is told when an inquiry is sent, and Global Privacy Control switches off the Meta Pixel and nothing else. We have chosen to measure the site and our advertising rather than to ask first. There is a separate Consumer Health Data Privacy Policy, written for the Washington and Nevada laws that treat even an inquiry to a health practice as health data; it says the same thing. We still do not sell your personal information, and the fonts are still served from our own servers rather than from a font network.
The only information you actively give us is what you type into the contact form and send. Everything else described here is collected in the background by the site, by our host, by Google Analytics and Google Ads, by Ahrefs Web Analytics and by Meta.