Food supplement based on Vitamin D3 (cholecalciferol) providing 100 mcg (4,000 IU) per drop. Vitamin D3 contributes to the normal absorption and utilization of calcium and phosphorus. It helps maintain normal blood calcium levels and contributes to the maintenance of normal bones and teeth. It supports normal muscle and immune system function and contributes to cell division. Instructions for Use: 1 drop daily under the tongue. Shake well before use.