Essential oils occur in all plants, in various amounts. These are complicated compounds not fully identified, each containing hundreds of components in microscopic amounts. They are found in all parts of the plant: the root, flowers, leaves, stems and fruits. On the amount, composition and structure depend not only on the aromatic, but also therapeutic properties. They work mainly by inhalation , getting into the bloodstream and externally (through the skin while rubbing into the body, bath or compress). They show the highest activity in herbal infusions. Their action is enhanced by stabilizing in the laboratory. They should be used only under medical supervision, as they can cause allergies. They are used to treat patients with headaches, insomnia, lack of concentration, flu, catarrh, cold. The use of essential oils in herbal spices stimulates the digestive system (stimulates appetite and increases the secretion of gastric juices), allowing for better absorption of food. Also used in the production of cosmetics. Available at: www.muscle-zone.pl