Information Reviews Ask Dr. Dan Product Description Progena Vitamin D3-as Cholescalciferol offers support for bone, joint, muscle and the immune system. Recommended usage is to follow the recommendations of your healthcare professional. Label Information Progena Vitamin D3 (as Cholescalciferol) Facts: Serving Size: One (1) capsule Vitamin D3 1000 IU, (as Cholecalciferol) Also includes: Gelatin (capsule) and Rice Flour