Ceramides 101

Every roundup on this site leans on the same handful of facts: what ceramides do, why the types are numbered the way they are, and why the barrier wants them alongside cholesterol and fatty acids rather than alone. This hub is where those facts live in full, written in plain English and cited to sources you can check — dermatology references and manufacturer spec sheets, not other people’s roundups.

Start with what ceramides are if you want the whole picture in one read. If you already know the basics and want the part everyone skips, the ceramide types explained lays out NP, AP, and EOP (and the old 1, 3, 6-II numbering) in a clean table — the reference we built because no competitor publishes it as one. From there, how ceramides repair the skin barrier is the mechanism, and where ceramides go in your routine is the practical bit: which step, in what order, with what.

We also keep the honest-answer guides here — the questions people actually type, answered directly instead of buried under 800 words of preamble. Do ceramides clog pores? What lotions actually have ceramides? Those get their own pages, each one linking back into the product hubs so you can act on the answer.

A note on how we write these: we did not run any lab studies, and we do not pretend to. What we do is read the primary sources, compile them, and cite them, so you can trace every claim to something real. That is the whole method, and it is on how we review in full.