Algas Calcareas is a marine algae found washed up on the beaches in Northern Brazil. This marine algae has been produced into the worlds first organic, plant sourced calcium, which also contains over 70 differnent trace minerals and nutritients. This calcium supplement is completely different from others. While most other calcium supplement are from rock (calcium carbonate),this is a marine algae  that is producing the calcium, making it a bio-active calcium supplement and much more easier to absorb into the body, to better benefit your health.