Vitamin D-3 Extra Strength, 1000 IU, 30 MlNow Vitamin D3 Extra Strength, 30 mL, 1000 IU, is a highly absorbable liquid supplement designed to support overall health. Vitamin D3 is essential for the body to absorb calcium, which is crucial for maintaining healthy bones and teeth. This product provides an extra strength dose, containing ten times the amount of D3 compared to the regular strength version. Vitamin D3 is typically obtained from dietary sources or produced by the skin when exposed