The major external factor causing photo-aging is UV radiation, especially UVA radiation. UVA levels in the solar spectrum vary only slightly with difference in latitude, time of day, weather and season. Thus, there is constant exposure to large amounts of UVA radiation during daylight hours and during the entire year. Substantial doses of UVA are accumulated in the course of a lifetime.

UVA radiation is the cause of solar elastosis, i.e. formation of wrinkles due to photo-aging. Further long-term photo-aging can also lead to a decrease in the synthesis and cross linking of collagen fiber, meaning that the skin finally loses its elasticity. Effective protection of the skin against UVA radiation is thus a major instrument in preserving the youthfulness of the skin.

Recently two major pathways which lead to premature photo-aging of the skin have been identified:

1. A UVA-induced cascading pathway leading to the formation of pro-inflammatory proteins which cause harmful effects in skin cells.
2. UVA-induced mutation of mitochondrial DNA. These mutations are known to contribute to the aging of cells and tissues.

Tests have shown that the application of RonaCare® Ectoin can avoid both pathways. Thus RonaCare® Ectoin protects the skin against photo-aging.

Day care cosmetic products can benefit from this innovative photo-protection. For this kind of products it is very important to provide UVA protection whilst UV filters may only be used sparingly. RonaCare® Ectoin offers a real alternative.