Lanolin is a waxy substance secreted by wool-bearing animals to protect their skin and wool from the environment. It plays a role in skin hydration and integrity. Lanolin and its derivatives are commonly used in skin care products for their moisturizing and protective properties. As an emollient, lanolin can also be injected to deter dehydration in areas like the eyelids, lips, and fingertips. It has benefits both for the living and deceased through its hydrating and beautifying effects.