★☆☆☆☆
WARNING!
I would be very wary of coral calcium. In addition to concerns about illegal harvesting of reefs, this is not a pure product. When Consumer Reports tested several brands of coral calcium in 2005 they found high levels of lead. Additionally, since coral calcium can only be harvested from dead reefs, it begs the question of what caused coral to die. While it could be benign factors such as increase in temperatures, it could also be more negative causes such as spills of oil from ships, discharge of industrial waste into reef areas, etc. In short, you don't know what pollutants are in this product, and you are chancing your health on using it. You can query the web also for many reports on the quackery and danger of this product.
