St. John's wort oil is one of the valuable plant species that is frequently the subject of scientific research in the fields of herbal treatment and alternative medicine, and many of its positive effects on health are accepted by the scientific world. St. John's wort oil, which has important benefits such as protection from diseases, delaying aging, and maintaining healthy body functions, can be easily found even in herbalists today. However, like every herbal product, St. John's wort oil is a product that should be used with caution. Individuals who have a chronic disease, constantly use medication for various reasons, or have food allergies should consult their physician before using St. John's wort oil and should not exceed the recommended doses.