You have probably seen them in the pharmacy: those distinctive spray cans of thermal water from La Roche-Posay, Avène, Uriage and Vichy. But what does that water actually do? Is it more than just water in an expensive can? Spoiler: yes. And the differences between brands are bigger than you might think.
In this article, we dive into the science behind thermal water, compare the most popular brands and help you choose which water suits your skin best.
What exactly is thermal water?
Thermal water is underground water that flows through volcanic rock, absorbing minerals and trace elements along the way. Each thermal spring has a unique composition, depending on the rock it passes through. This explains why each brand has a different mineral profile - and therefore different properties for your skin.
The French dermo-cosmetics industry discovered these natural springs decades ago. Spas in places like La Roche-Posay, Avène and Uriage have been treating skin conditions with their local spring water since the 18th century.
The four major brands compared
La Roche-Posay: the selenium specialist
La Roche-Posay thermal water is exceptionally rich in selenium, a powerful antioxidant with proven anti-inflammatory properties. This makes it particularly suitable for sensitive, reactive skin and skin irritated by treatments.
La Roche-Posay Nutritic Intense Riche - for extremely dry skin. Prices range from €19.51 to €39.79. That is a difference of more than €20! Compare prices on PharmaCompare
La Roche-Posay Pigmentclar Eyes - eye cream for dark circles. From €22.36 to €46.29, savings up to €23.93. Compare prices on PharmaCompare
Avène: gentle and soothing
Avène thermal water has low mineralisation and a neutral pH, making it particularly suitable for the most sensitive skin types. The water contains a unique microflora (Aqua Dolomiae) with calming and soothing properties.
Avène Cicalfate+ Cream 40ml - restorative cream for damaged skin. Available from €7.09. Compare prices on PharmaCompare
Avène Cleanance HYDRA - specially for skin dried out by anti-acne medication. From €13.34. Compare prices on PharmaCompare
Uriage: the mineral-rich all-rounder
Of all thermal waters, Uriage has the highest mineral content. The water is isotonic - meaning its mineral concentration is comparable to that of your skin cells. This allows it to be absorbed particularly well. The combination of calcium, magnesium, zinc and copper makes it versatile: hydrating, soothing and protective all at once.
Uriage Thermal Water Spray 150ml - the pure spray. Prices range from €7.54 to €17.45 - more than double! Comparing really pays off here. Compare prices on PharmaCompare
Uriage Age Lift Filler Cream 30ml - anti-ageing with thermal water as a base. From €29.40. Compare prices on PharmaCompare
Vichy: volcanic and strengthening
Vichy's thermal water comes from the heart of the Auvergne volcanoes and contains 15 essential minerals. It is particularly rich in iron, manganese and lithium. Vichy's strength lies in its fortifying effect: it helps restore your skin's natural barrier.
Vichy Aqualia Rich Cream - intensive hydration for dry skin. From €37.29. Compare prices on PharmaCompare
Vichy Homme Hydra Mag C Shower Gel - for men, with magnesium and vitamin C. From €12.39 to €21.39. Compare prices on PharmaCompare
Which thermal water suits you?
- Very sensitive or reactive skin - Choose Avène. The low mineralisation is the gentlest.
- Irritated skin or post-treatment - La Roche-Posay, thanks to the selenium.
- Dry skin needing hydration - Uriage, because it is isotonic and well absorbed.
- Mature skin or need for firmness - Vichy, with its strengthening minerals.
Comparing prices pays off
What stands out when comparing thermal products at Belgian online pharmacies like Viata, Farmaline and Medi-Market: the price differences are sometimes enormous. For some La Roche-Posay products, you literally pay double at one pharmacy compared to another.
Our tip: always compare before you buy. Especially with pricier care products that you need to repurchase regularly, those savings add up quickly.
Conclusion
Thermal water is not a marketing trick. It is a scientifically backed ingredient with real benefits for your skin. The choice between La Roche-Posay, Avène, Uriage and Vichy depends on what your skin needs. Whichever brand you choose: compare prices on PharmaCompare before you order. The price differences between Belgian pharmacies are sometimes surprisingly large.
Source attribution: inspired by The French Pharmacy Blog