Which ingredient is known for its ability to draw moisture into the skin?

Glycerin is a powerful humectant, meaning it has the ability to attract moisture from the environment and bind it to the skin. This property makes glycerin particularly beneficial in skincare products, as it helps to hydrate and maintain the moisture balance of the skin. With its ability to pull water into the epidermis, glycerin can improve skin texture and elasticity, making it feel softer and more supple.

Other ingredients mentioned have different functions. Mineral oil is primarily used as an occlusive agent that creates a barrier on the skin, preventing moisture loss, but it does not draw moisture in. Squalane is a hydrating ingredient that mimics the skin's natural oils and is excellent for moisturization, but it does not function as a humectant like glycerin. Ceramides are lipids that help strengthen the skin barrier and retain moisture but are not designed to attract moisture from the environment directly. Thus, glycerin stands out for its specific role in moisture attraction, confirming its suitability for this question.