Usually sensitive skin is very thin, irritable, tender and prone to allergies. Sebum production is very limited and thus the skin appears very dry. Couperose skin appears as eritrosis (skin redness), with dilated subcutaneous capillaries. As they grow weaker, they form a thick purple net which is visible on the surface, especially on the cheeks. This aesthetic damage becomes worse with sudden temperature changes.
Functional agents need to provide sensitive and couperose skin with nourishment and protection, as well as enriching the hydrolipid film with sebum-like substances. They need to reduce the redness with a vasoprotective, antioxidant effect, as well as decreasing the blood flow to the skin. Sea collagen is a very effective natural agent which works very well when applied onto thin, irritable skin.