Liposomes — extremely small, phospholipid membrane vesicles able to encapsulate and transport water-soluble (hydrophilic) and oil-soluble (lipophilic) substances. The delivery of active ingredients directly into the skin is one of the biggest challenges in skin care. This challenge has led to the development of liposomes in cosmetics. Their compatibility and affinity with cellular membranes allow them to be easily accepted and metabolized by the skin, and provide the skin with “actives” that would not be so readily accepted otherwise. Liposomes have brought to the cosmetic field widespread interest in the concepts of microencapsulation and targeted substance delivery.