What is Jonzac Bio-affinity ?

Five years of research, testing and formulation were dedicated to creating our dermo-cosmetic skincare with Jonzac thermal spring water, that is not only certified organic but also offers the same effectiveness and tolerability as conventional dermo-cosmetics.

Reconciling safety and efficacy in compliance with the rigorous Cosmebio formulation charter, while ensuring the levels of tolerability and safety required of dermo-cosmetics constituted a major challenge.

Therefore, the Eau Thermale Jonzac® brand has made the choice of banning questionable substances that are currently under review from our formulas.

In line with the concept of biomimicry, we privilege ingredients that show a natural affinity for skin cells, Jonzac thermal water being a leader in this category, since it is hypermineralized, and isotonic.

This same approach is used in formulating skin care products with emulsifiers that are capable of emulating the lamellar structure of the skin.

These challenging choices have resulted in formulas that are more natural and respectful of the skin’s physiology, which we define as LA BIO-AFFINITÉ® JONZAC.



The skin is composed of 70% water, and rich in minerals. When a product is applied, the water in the skincare comes into contact with the water contained in the skin.

When the mineral contents of these waters are different, the natural balance of the cells can be disturbed, subjecting the skin cells to malformations. Jonzac thermal spring water is isotonic, which means that its mineral content emulates that of the skin cells, forming a natural affinity.

Thus, the skin benefits fully from the effectiveness of Jonzac’s certified organic and high tolerance skincare products.



The skin is naturally organized in alternated layers of water and oil. If this lamellar structure is destabilized by skincare products that disrupt this natural balance, it can cause dehydration, dryness and irritation.

Eau Thermale Jonzac® has therefore chosen biomimetic lamellar emulsifying active ingredients so that its creams mimic the skin’s layered organization. Thus, Eau Thermale Jonzac® certified organic and high tolerance skincare products are perfectly compatible with the skin and optimally effective.




The skin is a living biological organism, and its natural balance can easily be disrupted All Eau Thermale Jonzac® products are certified organic and exclude artificial substances such as polyethylene glycols. These irritating substances can indeed disrupt the natural balance of the cells.

Eau Thermale Jonzac® certified organic skincare products minimize the risk of allergic reactions and can therefore claim to be high tolerance products.

This unique know-how, which combines organic certification and high tolerance, is ideal to maintain the balance of all skin types, including the most sensitive skins.