Vitamin D3 is an outstanding supplement for enhancing calcium absorption and ward off cancer. Other forms of Vit. D in scientific studies have been shown to be toxic. Vit. D3 is the safe supplement.
Vit K2 enhances calcium absorption and keeps calcium from collecting on arterial walls. Calcium buildup can cause strokes and heartattacks. Women who are taking calcium supplements should be taking Vit D3 and Vit K2. Some better calcium supplements on the market have these to elements included.