What is stearic acid?

Stearic acid is classified as a saturated fatty acid, and it is indeed found in a variety of animal and vegetable fats. Its chemical structure includes a long hydrocarbon chain, specifically consisting of 18 carbon atoms, which is characteristic of saturated fatty acids. The saturation indicates that all carbon atoms in the chain are bonded to hydrogen atoms without any double bonds, making it solid at room temperature.

Stearic acid is commonly included in various beauty and cosmetic formulations because it helps to stabilize and thicken products. It also plays a role in enhancing the texture and feel of creams and lotions, contributing to their emulsification and stability.

While the other options present various compounds and substances related to beauty and health, they do not accurately describe stearic acid’s specific characteristics or chemical classification. Understanding stearic acid's role in products is essential for beauty therapy practices, as it informs formulation choices and the effects these ingredients have on the skin.