Herbs and plants have been used by mankind since its early days, but their systematic study has been reported mainly in China, India, then Greece. In the modern era several medicines used effectively in medicine were derived from plants, and even today their derivatives have therapeutic importance, such as salicylic acid, belladonna, quinine, digital, cocaine, caffeine. Although it is not obtained from medicinal herbs, one cannot forget the importance of penicillin and other antibiotics, derived from fungi and bacteria. Fungi and bacteria are important in the manufacture of bread, wine, beer and cheese. Also of significant importance are vitamins found in plants and fruits, the lack of which was a frequent cause of deformities and death in times of food deprivation. Several plants were considered medicinal by the Brazilian Ministry of Health (
), but there is no scientific recognition of its effectiveness.