Utah Master Esthetician Practice Exam

Which ingredient contributes to the density of a cream?

1. Emollients

2. Humectants

3. Preservatives

4. Fragrances

The correct answer is: Humectants

In the context of skincare formulations, the density of a cream is significantly influenced by the use of emollients. Emollients are ingredients that help to create a barrier on the skin, preventing moisture loss and contributing to the overall texture and thickness of the product. They often provide a rich, creamy feel, which enhances the density of lotions and creams. Humectants, while essential for attracting moisture to the skin, primarily function to hydrate rather than to impart density to a cream. Their role is to pull in water from the environment or deeper layers of the skin, which can enhance hydration but not necessarily contribute to the cream's thickness or viscosity in the same way that emollients do. Preservatives are included in formulations to prevent microbial growth and extend shelf life, without affecting the product's density. Fragrances are added for sensory appeal and do not contribute to the physical structure or density of a cream. Thus, emollients are the key ingredients that impart a richer, denser texture to creams, ensuring they feel luxurious and provide an effective barrier for moisture retention on the skin.