The Science Behind Your Skin Barrier
In the last issue, I admitted I’d washed my face the same way for twenty-two years before I ever thought to question it. This is the part I didn’t understand then — what was actually happening at the sink, and why it started to matter more as my skin changed.
None of it is complicated. It just isn’t the story most of us were told.
Picture the outer layer of your skin as a brick wall. The skin cells are the bricks. Between them sits a mortar made of lipids — ceramides, cholesterol and fatty acids. Bricks and mortar together form one working surface: the skin barrier.
It’s a good image because it’s roughly true. The wall only does its job when both parts are intact. Lose some of the mortar and the wall is still standing — it just holds less well.
The barrier has two quiet jobs: keep the good things in, and keep the outside world out. Mostly, it slows the rate at which water evaporates from your skin, and it helps defend against the daily wear of weather, pollution and everything else your face meets in a day.
When it’s comfortable, you don’t think about it at all. You notice it only when it stops keeping up — when skin feels tight, rough, or reactive for no obvious reason.
Cleansing has to happen. Makeup, sunscreen, sweat and the day’s build-up all need to come off, and water alone won’t shift most of it.
To do that, cleansers use ingredients called surfactants — the things that lift oil-based grime so it can be rinsed away. They’re essential; there’s no cleansing without them. But some cleansing systems are stronger than others, and a strong one can remove more than the makeup and grime you meant to remove. Along with the day’s dirt, it can disturb some of the barrier’s own lipids — the mortar you’d rather keep.
That’s the part nobody mentions. Cleansing isn’t perfectly selective.
Here’s why it matters more later. As we get older, skin tends to produce less sebum — the surface oil that helps keep it soft and supple. The barrier’s needs shift, too. There’s simply less to spare.
So the exact cleanser that felt fine at twenty-eight can start to feel different at fifty. Not because the product changed — because the skin did.
When a drier surface loses more of its oil than it can comfortably replace, skin is left feeling tight and rough. And skin that’s low on water sits differently on the face — it looks less plump, less smooth, and fine lines can read as more pronounced.
To be clear: cleansing doesn’t cause wrinkles, and no cleanser removes them. But how your skin looks through the day owes a great deal to how comfortable and hydrated that outer layer is — and that starts with the very first step.
This is the part that felt backwards to me at first: cleaning your face with oil.
But oil dissolves oil. An emulsifying balm — oils and butters — melts into makeup, sunscreen and excess sebum and lifts them off. Then you add water, the balm turns milky, and the whole lot rinses away. It still relies on emulsifying chemistry to rinse clean; it’s simply a gentler way to get there.
The goal was never to leave oil sitting on your face. It’s to clean thoroughly while disturbing the barrier less. Same job — kinder to the mortar.
Clean effectively. Disturb less.
Your skin usually isn’t asking for another expensive cream to repair what cleansing took away an hour earlier. More often, it’s asking a smaller question — whether the first step could simply take less.
Tight was never the same as clean.
The balm this thinking led to is our Emulsifying Face Balm. But understanding your own barrier is worth more than any single product — ours included.