Marnys® Vitamin D in a certified high-quality liquid format that also allows the rapid release of the active ingredient and its absorption in the body. The vitamin D in Marnys® Vitamin D is the D3 form (cholecalciferol) and its source is the fat from sheep's wool. Vitamin D3 from Marnys® Liquid Vitamin D makes it an excellent food supplement for people who want to maintain their bone system and bone development in children, it is ideal for contributing to good muscle tone, as well as for maintaining normal absorption and use of calcium in the body. Directions for use: -0.5 ml a day, preferably in the morning.