Colloidal minerals Power Labs Colloidal Minerals are the most easily absorbed of all mineral supplements as they by-pass the digestive system. Being liquid and having an ultra fine particle size of 0.001 microns in diameter, they are approximately 2000 times smaller than the smallest metallic mineral, which makes them readily absorbed. Colloidal Minerals provide the structural material for bone and teeth formation. Calcium will not do this alone. In fact isolated calcium caltrate prescribed alone can deplete the body of other important essential minerals. Colloidal Minerals contain calcium in the most absorbent form on the planet. Minerals are derived from plants; they contain 75 different minerals and trace elements.