Lanolin

Figure 1. Lanolin is used topically as an emollient.

Lanolin, also called wool yolk, wool wax, or wool grease, is a wax secreted by the sebaceous glands of wool-bearing animals such as sheep. Lanolin is sometimes known as "wool fat", but because the compound lacks glycerides Lanolin is not a true fat. The purpose of Lanolin is to condition and protect sheep’s wool.

Lanolin and its derivative products are used extensively in both the personal care (e.g., high value cosmetics, facial cosmetics, lip products) and health care sectors such as topical liniments. Lanolin oil is known as an emollient and an occlusive moisturizer, which means it helps soothe dry or dehydrated skin and has the ability to slow water loss from the skin. Lanolin oil is also promoted to prevent wrinkles, dry hair, dry lips, and cracked nipples.

Lanolin is not a dietary supplement. It is used topically. Lanolin oil poisoning can occur in someone who has ingested the substance excessively. Lanolin oil poisoning may include diarrhoea, rash, swelling and redness of skin, and vomiting. People who are allergic to wool may experience eye, lip, mouth, and throat swelling, rash, and shortness of breath and therefore should avoid Lanolin.