Is calcium needed, yes. Does this guy say some good things yes. Does he say some bad things, yes. Does he say some very bad things, yes! When he said you can take his coral sea calcium and walk out in the bright sun and you will not get skin cancer was when i knew without a doubt this guy is not just a quack but criminally insane! I knew this guy was off base in the first few minutes. Please everyone don't get your science only from TV. There are many shysters like this guy trying to sell you all the magic solutions to living longer. He said on TV only his coral sea calcium works because it has microorganisms that come with the coral. Dr. Atkins diet caused controversy but at least you can show results in two weeks with many people. I doubt anyone will feel any different taking his calcium or any calcium supplement other than placebo effects. Extraordinary Claims need extraordinary Proof. Please enjoy your fear of getting kidney stones! If you live to 120 then I guess he is right!