INTRODUCTION

If your skin constantly feels dry — even after moisturizing — you’re likely dealing with something deeper than just “lack of hydration.”

You might apply lotion, oils, or creams… and still feel dry again within hours.

That’s because the real issue may not be adding moisture.

👉 It may be losing it too quickly.

This process is called transepidermal water loss (TEWL) — and it’s one of the most important (and overlooked) reasons why dry skin stays dry.

In this article, we’ll break down exactly what TEWL is, how it affects your skin, why soap can increase it, and how to reduce it for long-term skin balance.

We’ll also explain how Josspure soaps are formulated to help minimize TEWL during cleansing.

TABLE OF CONTENTS

1. What is TEWL

2. How healthy skin controls moisture loss

3. Why dry skin has higher TEWL

4. How soap increases TEWL

5. Signs of high TEWL

6. Why moisturizing alone doesn’t fix it

7. How to reduce TEWL naturally

8. Cleansing habits that protect your skin

9. Josspure TEWL-support approach

10. FAQ

 1. WHAT IS TEWL?

Transepidermal Water Loss (TEWL) is the process of water naturally evaporating from your skin.

It happens all the time — even in healthy skin.

But the key difference is:

✔ healthy skin = controlled TEWL
❌ dry skin = excessive TEWL

When TEWL is too high, your skin loses moisture faster than it can retain it.

 

 2. HOW HEALTHY SKIN CONTROLS MOISTURE LOSS

A healthy skin barrier uses:

• lipids (fats)

• ceramides

• natural oils

to create a seal that slows down water evaporation.

Think of it like a protective shield that keeps hydration inside your skin.

 

 3. WHY DRY SKIN HAS HIGHER TEWL

Dry skin typically has:

• fewer lipids

• weaker barrier structure

• reduced moisture retention

This means:

👉 water escapes more easily and more quickly

So even if you hydrate your skin, it doesn’t stay hydrated.

 

 4. HOW SOAP INCREASES TEWL

Soap directly affects TEWL by removing protective lipids.

When these lipids are stripped:

• the barrier becomes more permeable

• water evaporates faster

• skin becomes dehydrated

Harsh soaps increase TEWL significantly, especially for dry or sensitive skin.

 5. SIGNS OF HIGH TEWL

If your skin has high TEWL, you may notice:

• dryness shortly after moisturizing

• tightness after washing

• flaky or rough texture

• increased sensitivity

• dull appearance

These are signs your skin cannot hold moisture effectively.

 

 6. WHY MOISTURIZING ALONE DOESN’T FIX IT

Most people try to fix dry skin by adding more hydration.

But if TEWL is high:

👉 moisture escapes just as quickly as it’s added

This creates a cycle:

Moisturize → temporary relief → dryness returns

Without addressing TEWL, the root problem remains.

 

 7. HOW TO REDUCE TEWL NATURALLY

To reduce TEWL, focus on strengthening your skin barrier:

✔ use gentle, lipid-supporting soap
✔ avoid harsh surfactants
✔ reduce hot water exposure
✔ apply moisturizer immediately after washing
✔ use barrier-supporting ingredients

 

 8. CLEANSING HABITS THAT PROTECT YOUR SKIN

Your cleansing routine plays a major role in TEWL.

To protect your skin:

• use lukewarm water

• limit shower time

• avoid over-cleansing

• choose nourishing, oil-based soap

These habits help maintain your skin’s natural barrier.

 9. JOSSPURE TEWL-SUPPORT APPROACH

Josspure is designed to reduce TEWL during cleansing.

Each formula includes:

• shea butter to reinforce lipids

• sunflower oil to support barrier function

• oatmeal to soothe

• chamomile to calm

The goal:

👉 help your skin hold onto moisture instead of losing it.

 

 FAQ

What causes TEWL?

Barrier damage and loss of protective lipids.

Can soap increase TEWL?

Yes — especially harsh or detergent-based soap.

How do I fix high TEWL?

By strengthening your skin barrier and using gentle cleansing.

 

 CONCLUSION

Dry skin is not just about needing more moisture — it’s about losing it too quickly.

When TEWL is high, your skin cannot stay hydrated no matter what you apply.

But when you reduce moisture loss at the source, your skin begins to hold hydration naturally again.

Other articles you might like: 

1. The Ultimate Guide to Soap for Dry Skin: How to Choose the Right Cleanser for a Healthy Skin Barrier

2. Soap for dry skin: What Actually Works

3. Why Your Soap Is Making Dry Skin Worse (Even If It Claims to Be “Moisturizing”)

4. Soap for Dry Skin vs Body Wash: What’s Better for a Healthy Skin Barrier?

5. Best Ingredients in Soap for Dry Skin (That Actually Heal Your Skin Barrier)