If you notice that your skin becomes tight, flaky or more sensitive to the products it previously once tolerated without any reaction then this problem is not caused only by the lack of moisture but also by the compromised condition of the skin barrier itself. Therefore, a good barrier repair product is made of lipids such as ceramides, cholesterol and fatty acids.
In case this protective layer gets disturbed by over-cleansing, external influences, active ingredients or ageing, the process of moisture evaporation happens faster than its restoration, causing dry or sensitised skin. Ceramide moisturisers have a similar composition to those lipids which make up the skin barrier, but the effectiveness of ceramide products varies depending on different factors.
