STR/04 The Formulas
Eight products, eight addresses.
Every formula below is built around actives whose target layer is published, not implied. Filter by layer to see what actually reaches where.
$42
CorneumEpidermis Toner
AHA Renewal Toner 8%
Surface exfoliation without skipping the humectant most acid toners leave out.
$54
CorneumEpidermis Cream
Corneum Barrier Cream
Ceramides where the barrier actually needs them, with niacinamide for tone support.
$38
Corneum SPF
Daily Mineral Shield SPF 30
A mineral-only filter that stays exactly where sunscreen is supposed to stay: on the surface.
$58
EpidermisCorneum Treatment
Night Retinol 0.3
A measured retinoid dose, buffered with the same barrier lipid your skin already makes.