St John’s Wort Oil is primarily used to help relieve digestive problems. It can also be used to help treat respiratory problems, menstrual difficulties, fungal infections, and skin problems. St John's Wort oil contains beneficial properties that help address dandruff and oily hair. It can also be used as a shampoo because of its cleansing effects. This oil is often used to help prevent signs of aging like wrinkles and sagging skin this is why it is also added to skin care products.