Colloids are very small in size and therefore easily absorbed by the cells of the body.
Plants convert metallic minerals into this form. Dr. Carey Reams, a well known biophysicist and biochemist, discovered that colloids can get so small they can go through glass. They have a natural negative electrical charge. Dr. Reams found that the human body requires 84 of the known 106 elements to maintain optimum health. Many more than is currently recognized.