The sun is out, temperatures are rising, and you're diligently applying sunscreen. Good. But are you doing enough to keep your skin hydrated from within? Most people underestimate how much moisture their skin loses during summer - and there's a term for it: TEWL, or Trans Epidermal Water Loss.
TEWL is the process where water from deeper skin layers evaporates through the epidermis. It's normal to some degree, but summer accelerates it dramatically through heat, sun, wind, air conditioning, and chlorinated water.
What is TEWL?
Your skin works like a brick wall: cells are the bricks, lipids between them are the mortar. When the mortar is intact, your skin retains moisture well. But once the barrier is damaged, water escapes.
Summer culprits: UV radiation damages barrier lipids, air conditioning pulls moisture from skin, pool chlorine strips natural oils, and evaporating sweat takes extra water with it.
How to recognise dehydrated skin
Important distinction: dehydrated skin ≠ dry skin type. Dry skin lacks oil. Dehydrated skin - regardless of skin type - lacks water. You can have oily skin that's dehydrated.
Signs: fine dehydration lines, dull complexion despite a tan, tight feeling after cleansing, makeup that settles into lines.
Bioderma products for summer
Bioderma Photoderm Brume Invisible SPF50+ Spray 150ml - €18.13
A transparent spray that applies effortlessly, even on hard-to-reach areas. UVA and UVB protection with no white cast. Perfect for active lifestyles.
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Bioderma Photoderm Ultra SPF50+ Milk 200ml - €16.77
A classic sun milk with surprisingly light texture for an SPF50+. The 200ml bottle is economical for the whole family.
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Bioderma Photoderm Aftersun Gel-cream 500ml - €16.94
The step everyone skips. After a day in the sun, your skin needs recovery. This gel-cream calms, repairs, and intensively hydrates. The 500ml format is unbeatable value.
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Bioderma Atoderm Shower Oil 1l - €17.14
Replace your harsh shower gel with this oil that cleanses without destroying the skin barrier. Essential after swimming or beach days.
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Bioderma Nodé Shampoo 400ml - €12.14
Your scalp suffers from sun and chlorine too. This gentle sulfate-free shampoo cleanses while respecting the scalp's balance.
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Compare to save
The complete Bioderma summer basket costs around €81, but by comparing prices on PharmaCompare across Viata, Farmaline, and Medi-Market, you can easily save 10-15%.
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Conclusion
Hydration isn't a summer luxury - it's a necessity. Sun protection, gentle cleansing, and consistent hydration form the foundation. Bioderma makes it accessible with scientifically proven products.
Always compare prices on PharmaCompare before ordering. Your skin - and your wallet - will thank you.
Inspired by Keeping your skin hydrated this summer and avoid TEWL from Le French Skin Care Blog.