Ceramide EOP

Ceramide EOP (historically Ceramide 1) carries an ω-hydroxy fatty acid esterified to linoleic acid. It is relatively scarce in SC but important for organising the lipid matrix alongside ceramide NPCeramide NPModerateCeramide NP · Sphingolipid (non-hydroxy fatty acid, phytosphingosine)The most abundant ceramide class in the stratum corneum; topical replacement improves barrier in controlled trials.Open in the Index →, ceramide APCeramide APModerateCeramide AP · Skin-identical sphingolipid (α-hydroxy fatty acid)Barrier ceramide (formerly Ceramide 6-II) used with NP/EOP and cholesterol in multi-ceramide moisturisers.Open in the Index →, and cholesterolCholesterolStrongCholesterol · Sterol barrier lipidEssential stratum corneum lipid; with ceramides and free fatty acids it reconstitutes the barrier lipid triad.Open in the Index →[1].

What it does

EOP helps tether and organise lamellar sheets. Barrier formulas that include EOP with other ceramides aim to mimic native SC lipid diversity[1][2].

The evidence

Lipidomics and barrier physiology support EOP’s structural role; clinical outcomes again track multi-lipid systems more than single-ceramide spikes[1][2].

How to use it

A positive signal on an INCI when NP/AP/EOP appear together with cholesterol — not a solo hero ingredient.