How this is paid for, and what happens to your data.

Paid links

Some pages, videos and emails from Twice Precise may contain paid links. If you buy through one, I earn a commission at no extra cost to you.

A disclosure at the bottom of a website doesn't help someone who landed on one page, so I don't rely on this page alone. Every paid link is labelled “paid link” right where it appears, like this: paid link. A page, email or video with paid links says so before the first one. In videos, it's spoken and on screen in the first 30 seconds.

Current relationships

When that changes, each program will be listed here with the date it started and what it pays for. For example, a flat fee per purchase, or a share of a subscription.

The rules I follow

• The order comes from the numbers alone. The price tracker sorts by price per result or price per gram. How much a company pays me plays no part in the order, and my own discount codes are left out of the sums.
• Companies that don't pay stay listed. A product doesn't disappear because the company has no affiliate program or turned me down. The tracker shows which is which.
• Payment doesn't change what I report. If a paying company's product doesn't hold up, I'll say so.
• Free products and discounts are disclosed, even if nobody asked for anything in return.
• No fake reviews or testimonials. Everything reported here is something I measured or read myself.

Not medical advice

Twice Precise shares one person's test results and talks about published research. It is not medical advice. I'm not a doctor or any other kind of healthcare professional. One person's results tell you nothing reliable about yours. Talk to your doctor before starting, stopping or changing anything about your health, including supplements.

Statements about dietary supplements on this site have not been evaluated by the Food and Drug Administration. No product mentioned here is intended to diagnose, treat, cure or prevent any disease.

Privacy

This website

This site sets no cookies, runs no analytics, has no tracking pixels and loads no scripts. The fonts are hosted here, so your browser doesn't contact Google or any other font service. There are no forms on this site.

The site is hosted on Cloudflare. Cloudflare processes the technical details of each request, such as IP address and browser type, to deliver the pages and protect them from abuse. See Cloudflare's privacy policy.

The newsletter

The subscribe button takes you to the newsletter's own page, which runs on Beehiiv. When you subscribe, Beehiiv stores your email address. Like most email services, it also records whether emails are opened and which links are clicked. I can see your address and those statistics. Beehiiv's privacy policy covers how it handles that data.

I don't sell, rent or share your email address. Every email has a one-click unsubscribe link.

Email

If you email me, your message is stored in my mailbox and used only to reply.

Your requests

To have your email address or messages deleted, or to ask what I hold about you, email hello@twiceprecise.com. This site isn't directed at children under 16.