I really don't want to throw cold water on your placebo, but coral calcium is a scheme. Nobody takes coral calcium naturally. The story was that the Japanese on Okinawa, not the Chinese, had high levels of coral calcium in their water, but it's not actually true. Coral calcium is in salt water, not fresh water, and nobody obviously drinks salt water. And while it is true the people of Okinawa are some of the longest lived people on Earth, it's from their very good diet.