Vitamin D3 is the preferred form, due to its high level of biological activity.
Assists in the absorption of calcium Perfect for those who cannot take solid supplements or who have trouble with digestion. The main function of vitamin D is to maintain normal blood levels of calcium and phosphorus.. LifeTime Liquid D3 Maximum Strength provides vitamin D3 (cholecalciferol) in an easy-to-take, once-daily, liquid drink for optimal absorption by the body, now in a high potency therapeutic dose of 4000 IU, since current research suggests previous vitamin D recommendations are inadequate to maintain healthy levels.