Organic/chemical filters

An organic sunscreen filter is a molecule capable of absorbing ultraviolet radiation. After absorption, the energy is converted into heat, which helps to limit the impact of UV on the skin.

Not all chemical filters have a bad reputation. Diethylhexyl butamido triazone, or iscotrizinol, and phenylbenzimidazole sulfonic acid, or ensulizole, are completely safe for the skin.

Some filters primarily target UVB radiation, while others absorb more UVA. Cosmetic products often combine several filters in order to achieve broad-spectrum protection.

Certain filters can partially penetrate the stratum corneum. However, their systemic absorption remains low at the concentrations used in cosmetic products.

Photostability varies between molecules. Certain chemical filters can indeed degrade under the effect of UV radiation, such as avobenzone.

Certain types of sensitive skin may react to organic filters. In such cases, formulas using mineral filters may be more appropriate.

By protecting the skin against the sun’s rays, chemical sun filters help to limit the effects of photoageing. Regular sun protection is a key element in preventing sun-related damage.

In general, it is preferable to use mineral sunscreen filters to protect children. That said, it must be stressed that it is essential not to expose children to the sun.

This depends on the organic filters and the formulation. If you are planning to swim, give preference to water‑resistant (“waterproof”) products, and remember to reapply your sunscreen after each swim.