Squalene is a natural organic compound that is found in various plants and animals, including sharks, olives, and amaranth. It is a type of hydrocarbon and is often used in cosmetics and skincare products due to its moisturizing properties. Squalene is also a precursor to cholesterol and other steroids in the body. In addition to its cosmetic uses, squalene has gained attention for its potential health benefits. It is known for its antioxidant properties and may support the immune system. Some researchers are exploring its role in vaccines, as it can enhance the body's response to immunization.