Organic/chemical filters

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

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

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

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

Photostability varies depending on the molecule. Certain chemical filters can in fact degrade under UV exposure, such as avobenzone.

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

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

In general, it is preferable to use mineral sunscreens to protect children. That said, it is essential to remember that children should not be exposed to the sun.

It depends on the organic filters and the formulation. If you plan to go swimming, choose water-resistant (“waterproof”) products, and remember to reapply your sunscreen after each swim.