Privacy Notice
Last updated 20 July 2026
Pith is a weekly email digest of health-topic highlights. This notice explains, in plain language, what personal data we collect, why, who helps us process it, how long we keep it, and the choices you have. We keep the amount of data we hold deliberately small.
Who we are
Pith ("we", "us") operates pith.health. For any privacy question or request, contact privacy@pith.health, or simply reply to any Pith email.
What we collect
- Your email address — so we can send your digest.
- The topics you choose (e.g. sleep, creatine, longevity) — so the digest is about what you actually want to read.
- Basic delivery signals — whether a digest was sent, and if you later click a link in it, so we can improve what we surface. We do not use cookies to track you across the web.
We do not ask for your name, address, payment details (any payment is handled by Stripe on their own systems — we never see your card), or any account password.
Why we're allowed to use it (legal basis)
Where the GDPR applies, our basis is your consent, which you give by ticking the box when you join the waitlist. You can withdraw it at any time (see Your rights), and withdrawing it does not affect anything we did before you withdrew.
Who processes your data
We use a few trusted service providers ("processors") to run Pith. They act on our instructions and are not permitted to use your data for their own purposes:
| Provider | What they do | What they touch |
|---|---|---|
| Formspree | Receives the waitlist form when you join | Your email + chosen topics |
| Resend | Sends your digest emails | Your email address |
| Cloudflare | Hosts the website and DNS | Standard web request logs |
We also use AI services (for transcription and summarizing) to process public source content — podcasts, newsletters, and videos. Those services do not receive your email or your topic list; they never see who you are.
We do not sell, rent, or share your personal data with anyone for advertising.
How long we keep it
We keep your email and topics for as long as you're subscribed. If you unsubscribe or ask us to delete your data, we remove it promptly (and in any case within 30 days), except where we must keep a minimal record to honor your unsubscribe choice.
Your rights
You can, at any time:
- See what we hold about you;
- Correct it;
- Delete it, and withdraw your consent;
- Unsubscribe from every email (there's a link in every digest).
To exercise any of these, email privacy@pith.health or reply to any digest. We'll action it and confirm. If you're in the EU/UK and unhappy with our response, you may complain to your local data protection authority.
Children
Pith is not intended for anyone under 16, and we don't knowingly collect their data.
Changes
If we change this notice materially, we'll update the date above and, where appropriate, tell you by email before the change affects you.