Sundown's Calcium 1200 mg Plus Vitamin D3 is a well-rounded supplement for bone health due to its dual inclusion of a substantial calcium dose and the vital Vitamin D3. Vitamin D3 is indispensable for facilitating calcium absorption from the gut and its proper deposition into bones, making this product more effective than calcium-only supplements. While the 1200mg elemental calcium from calcium carbonate is a strong dose, it's generally advised to consume no more than 500-600mg of elemental calcium at once for optimal absorption, meaning users might benefit from splitting the daily dose into two separate intakes if they are taking the full serving at once. The softgel form may also appeal to those who prefer an easier-to-swallow option.