Preservatives are found in many cosmetic products, and are ingredients that prevent or reduce microbial growth in the product and keep it in good condition. If a cosmetic product becomes contaminated with bacteria, it can no longer be used. Although not all cosmetic products need them, the use of preservatives is important to prevent microbial contamination, so that the product continues to provide the benefits your skin needs.
It’s important to use a variety of preservatives, as many of them can cause sensitivity, and while their use is safe under normal conditions, continuous use may result in over-exposure. Research into other ingredients, such as natural polyphenols, for their possible use as preservatives is therefore of vital interest.