For all of these functions to continue normally the blood must maintain an exact calcium level. Organic refers to that which exists in a living entity. The calcium in vegetables is organic. Rock minerals, designed to be eaten by plants, not people, are inorganic. Organic minerals are held in place by what chemists term covalent bonds.
Covalent bonds are easy for the body to break apart and thereafter use the minerals as nourishment.
Rocks, salts, and other inorganic materials are held together by what chemists call ionic bonds, which are extremely hard , strong bonds which the body cannot break apart. The body cannot use inorganic calcium no matter how desperately it may need it. Calcium carbonate, widely used in poor quality calcium supplements, is of this inorganic type. The loose covalent form of organic calcium found in fresh raw fruits and vegetables is the most usable form for animals and humans. These foods, in the uncooked form, provide us with calcium and the other vital minerals in the form that can be immediately used by the body for growth and repair.