Guides
Understand your results. Keep them private.
Plain-language guides to lab reports, units and the numbers on your results — and to keeping your health records safe. Information, not medical advice.
Understanding your results
How to read your lab report
Results, units, reference ranges and H/L flags explained in plain language — and why a result outside the range isn't automatically a problem.
mmol/L or mg/dL? Lab units explained
Why labs report the same test in different units, and a conversion table for glucose, cholesterol, creatinine, vitamin D, HbA1c and more.
What is Phenotypic Age?
The research estimate of biological age from nine routine blood tests: where it comes from, what goes into it, and what it can't tell you.
Tracking your health records
How to track your blood test results over time
Why the trend across years says more than one result, and a simple way to keep every report organised — for you and your family.
How to keep a medication list for appointments and emergencies
What to write down for each medicine and allergy, why generic names travel better than brand names, and a routine that keeps the list current.
Privacy & security
Why your health records should be end-to-end encrypted
What "encrypted" really means for a health app, the difference end-to-end encryption makes, and five questions to ask before you trust one.
End-to-end encrypting a health-records web app
A technical walk-through: Argon2id and HKDF, a wrapped data key, AAD-bound records, passkey unlock with WebAuthn PRF — and a live demo of an encrypted account that can't be changed.
Keep every result in one private place.
Track your bloodwork over time — encrypted on your device, readable only by you.