Liquid formulation of vitamin D, in the form of D3 (cholecalciferol), which allows for the rapid release of the active ingredient and its absorption into the body. The vitamin D formulation in MARNYS® liquid vitamin D formulation is Extra Virgin Olive Oil, providing less susceptibility to oxidation, which confers high stability. Vitamin D contributes to the normal maintenance of bones, teeth, and muscle function, to normal bone growth and development in children, to the normal absorption and utilization of calcium and phosphorus, and to normal blood calcium levels. It contributes to the normal function of the immune system, including in children, and participates in the process of cell division. Directions for use: Take 0.5 ml daily, preferably in the morning (the dropper has the measurements printed on it). Place 0.5 ml of the dropper onto a teaspoon and swallow.