As these lipids will reduce TEWL, it is also necessary to provide the skin with hydrating ingredients to eliminate dehydration. Hyaluronic acid, in both medium and low molecular weights, is beneficial as it brings moisture to the upper and lower layers of the skin. Dehydration is not specific to dry skin. All skin types can be affected by dehydration. Therefore, it is always beneficial to ensure the serum used contains one or more moisturizing ingredients to keep the skin plump and quenched.
Aging skin has many requirements and the wonderful thing about serums is that we can intensely treat expression lines, fine lines, wrinkles, and loss of skin tone. In order to garner the best results, we would generally focus on one condition at a time, switching from one formulation to another, throughout the year.
Expression lines are usually the first to appear on the skin, as we tend to mimic the same expressions over and over again. Neurotransmitter peptides, such as Argireline and Myoxinol, provide a myo-relaxing action to reduce the appearance of expression lines and wrinkles, making them the first choice to topically address this concern.