Dry Skin Isn’t Always a Moisture Problem: A Dermatologist Explains the Skin Barrier

Division Chief, Dermatology

Dr. Arpana A Shah brings 25 years of clinical, surgical, and 

cosmetic dermatology to Kayura and a voice that shapes how we 

think, formulate, and grow.

_________________________________________

One of the most common things I hear from patients is: “I keep moisturizing, but my skin still feels dry.”

And when I look at their skin, sometimes it isn't a lack of moisturizer that's the problem. Their skin barrier is struggling to hold on to moisture. You may recognize the signs: skin that feels tight after cleansing, looks shiny but still feels dry, becomes rough or reactive, or suddenly doesn't tolerate products it used to.

When I see that pattern, I start thinking about the barrier.

Your Skin Has a Barrier for a Reason

The outermost layer of your skin, the stratum corneum, has two important jobs: keeping unwanted irritants out and keeping water from escaping too quickly. A healthy barrier depends heavily on three types of lipids: ceramides, cholesterol, and fatty acids.

Think of your skin cells as bricks and these lipids as the mortar between them. When that structure is intact, water stays where it belongs. When it's disrupted, transepidermal water loss increases and that's when skin can start feeling persistently dry, tight, rough, or sensitive.

What Usually Throws the Barrier Off?

I see it most often when skin has simply been asked to do too much. Retinoids, over-exfoliation, harsh cleansing, hot water, and dry weather.

None of these are inherently bad for your skin. The problem is when the skin's ability to recover can't keep up with the stress being placed on it. And once the barrier is compromised, adding more hydration isn't always enough.

You also have to help the skin keep it there.

Why Your Moisturizer May Not Be Enough

This is where I think people often oversimplify dry skin.

A moisturizer can add water to the skin. It can also soften the surface and reduce water loss. But if your barrier is compromised, I want more than a temporary feeling of softness. I want ingredients that support the lipid structure of the barrier itself. That's why I pay attention to ceramides, cholesterol, and fatty acids.

They're not just popular “barrier ingredients.” They're naturally part of the structure that helps your skin retain water in the first place. And importantly, I don't look for ceramides in isolation. Your barrier is a system. Its lipids work together.

What I Look For in a Barrier Cream

When the barrier is compromised, several things can happen at once.

The skin can lose water more easily. Its natural mix of ceramides, cholesterol, and fatty acids can become disrupted. Water and glycerol transport within the epidermis can also be affected, which is where channels such as aquaporin-3 become relevant to maintaining skin hydration.

So effective barrier care has to do more than add moisture. It needs to replace what the barrier has lost, help hold water in, and create the right conditions for the barrier to recover.

That's why I look for a combination of ceramides and cholesterol, alongside ingredients that support hydration and help reduce water loss. These components work together to support the lipid structure that keeps the barrier intact. 

But there is another part of the equation that is often overlooked: inflammation.

When the barrier is compromised, irritants can penetrate more easily and trigger inflammatory signaling, creating a cycle that can leave already-stressed skin feeling even more reactive. So I also want ingredients that help calm and protect the skin while the barrier recovers.

Where Dew Restore Comes In

This is why I like to think about barrier repair as more than simply “locking in moisture.”

It combines five ceramides + cholesterol to support the skin’s lipid barrier, while Glyceryl Glucoside supports Aquaporin-3, one of the channels involved in moving water and glycerol through the epidermis.

Then there’s Ectoin, alongside Kayura’s botanical blend of Cassia Fistula, Holy Basil, and Silymarin, to support skin that feels stressed and reactive.

Add squalane, mango seed butter, glycerin, and phospholipids, and you have a formula approaching barrier repair from several directions at once: replenishing lipids, supporting water movement, reducing moisture loss, and comforting stressed skin.

That’s ultimately why I trust it when the barrier has taken a hit.