Our Evening Primrose Base Oils are ideal for diluting essential oils before using them on skin. All our base oils are 100% natural pure oil.Common Evening Primrose, sometimes known as Evening Star is a Biennial plant common to NorthAmerica and other temperate countries. The plant is named Evening Primrose as the flowers open fullyat night and close up again through the morning of the next day.Evening Primrose Oil is said to have many properties.Among them are a number of positive effects to theskin such as helping with dandruff, eczema and psoriasis.Taken internally it is also said to combatdegenerative diseases, heart disease and cholesterol.