St. John's Wort or Hypericum* (Hypericum perforatum) is a plant whose flowers, when they bloom, are yellow or golden yellow. Its main characteristic is the small spots in orange, red, or even brown colors found on its flowers. Its medicinal properties are mainly due to the substance hypericin. 

St. John's Wort or Hypericum has both external and internal uses. The production of its oil, known as St. John's Wort oil or Hypericum oil, is widely known for its positive effect on digestion. 

What makes it very special, however, is its effect on psychology. The consumption of St. John's Wort increases the percentage of these substances and thus acts as an antidepressant. 

It is said that its regular consumption helps in the smooth functioning of the nervous system. However, this type of effect is not immediate. A person should consume St. John's Wort regularly for at least 2 to 3 weeks. Many claim that a "treatment" with St. John's Wort shows results when it lasts for more than 4 to 6 months.

St. John's Wort oil, when used externally, is ideal for wound healing and has soothing properties, especially in the case of burns. It also relieves muscle and arthritic pains. 

Some researchers attribute anti-inflammatory, antibacterial, and tonic (especially for the circulatory system) properties to St. John's Wort oil. Additionally, the consumption of St. John's Wort oil has beneficial properties in cases of gastritis, inflammation of the gallbladder, and problems of the lower respiratory system.