The system, written down. Order of application, cadence, and what pairs with what — the reasoning behind the range, in one document.
Most routines fail on sequence rather than ingredients. An acid used on the wrong night, a vitamin C layered under the wrong thing, a renewal serum applied twice as often as it should be — each one quietly undoes the work of the others. Core sets out the protocol in full: what goes on when, at what frequency, and why each decision was made that way.
Seventeen pages on sequence, cadence and pairing. Download it now — no email, no account, nothing to fill in.
Download the protocolCore documents the range. See the daily protocol or the ingredient library.