Vitamin K is found in nature in two forms - K1, also called phylloquinone, is found in plants and vitamin K2, also called menaquinone, which can be synthesized by many bacteria. Vitamin K1 (phylloquinone) in seabuckthorn amounts to about 1.2 mg %, i.e. more than in ash berries. Vitamin K is used in the body to control blood clotting and is essential for synthesizing the liver protein that controls the clotting. It is also helpful in bone formation and repair. In the intestines it also assists in converting glucose to glycogen, that can then be stored in the liver. There have been studies confirming that Vitamin K may decrease the incidence or severity of osteoporosis and slow bone loss.