Although lanolin does have well documented hydrating properties, a minority of people are quite sensitive to it, and PURE Papaya Ointment was formulated to be as hypoallergenic as possible, hence no lanolin. Lanolin is a wax secreted by the sebaceous glands at the base of sheep’s wool, and at one time it was thought that the pesticides and other chemicals used in sheep dip may cause the lanolin to harbour some potentially irritating compounds, however, modern production and purification techniques minimize the potential for adverse reactions