White Mulberry - deciduous tree belonging to the mulberry family. It is native to China, although currently the plant can also be found in other regions of Asia, as well as in Africa, Europe and America. It is a tree that serves an ornamental function, but for years it has been cultivated primarily in connection with the breeding of the mulberry silkworm - because the leaves of the white mulberry provide food for insect caterpillars. Although white mulberry is famous for its sweet fruit, it is the leaves of the plant that contain the largest amounts of valuable components - in white mulberry leaves you can find, among other things, 1-deoxynojirimycin (DNJ), a compound for the content of which the extract from the plant used in the OstroVit preparation is standardized, which has a positive effect on the quality of the dietary supplement.