Detailed answer

Glycerin is a common ingredient in moisturizers due to its role as a humectant. As a humectant, it has the ability to draw in moisture from the environment and bind it to the skin, helping to hydrate and improve the skin's moisture levels. Glycerin forms a protective layer on the skin, preventing excessive water loss and maintaining an optimal level of hydration. It also has a soothing effect on the skin, making it suitable for those with dry or sensitive skin. Additionally, glycerin has the ability to enhance the effectiveness of other active ingredients in moisturizers, as it helps them penetrate deeper into the skin. Overall, glycerin is an important ingredient in moisturizers as it helps to keep the skin hydrated, soft, and supple.