The human skin has many functions and one of the main functions is to ensure that moisture stays within the skin so that our skin is not dry.
The skin, however, does not always perform this function perfectly so therefore it is common practice to employ the help of moisturisers to assist the skin’s functions.
Moisturiser usually has one of three components that help it perform it’s functions.
The first ingredient is Humectants which includes products such as glycerin. The purpose of this ingredient is to attract water from the dermis and keep that water inside the skin. Glycerin is a popular choice becuase it is low cost and has a high efficacy.
The second ingredient is occlusive agents which moisture the skin by prevent moisture loss through a protective barrier. The types of ingredients used for this is oils and waxes.
The final choice is emollients which help improve the appearance of skin by ensuring flaking skin has a smoothed out appearance.