Minerals play an extremely vital role in how the human body functions. Vitamins and other nutrients can be thought of as the inch spark plugs inch of the human body while minerals can be thought of as the inch igniters inch of the inch spark plugs inch. Not only is calcium needed for strong bones, it is also essential for healthy hair, skin, nails and for proper nerve and heart function. If you can't get enough through your diet and most people don't, calcium supplementation is an effective way to ensure you get your adequate daily intake.