What characteristic do oil serums share?

Oil serums are considered anhydrous products, which means they do not contain water in their formulation. This characteristic is significant because it allows oil serums to provide intense moisture and nourishment to the skin without dilution from water. Instead of incorporating water, they rely on oils, which can better penetrate the skin's barrier and deliver beneficial ingredients like vitamins, essential fatty acids, and antioxidants more effectively.

The presence of oils also means that these serums can create a protective layer on the skin, helping to lock in moisture and provide a smooth finish. This is particularly beneficial for those with dry or dehydrated skin types.

While water-soluble products are common in many skincare formulations, oil serums are specifically designed to be oil-based, differentiating them from water-driven solutions. Additionally, while some serums can contain alcohols or potentially irritating ingredients, a well-formulated oil serum is usually gentle and intended to soothe rather than irritate the skin.