F o o d  -------------------------------------------------------------------------------------------------------------------------  Calcium-Definition  Calcium is a soft, gray, metal mainly found in the hard part of your bones.  The way calcium effects your body is to play a role in keep your bones and teeth strong and healthy.  Vitamin A  Vitamin A is important for your immune system, your vision, reproduction, your lungs, kidneys, and heart.  Vitamin B  Vitamin B helps keep your cells healthy and helps with DNA short for Deoxyribonucleic acid.  Vitamin C  Vitamin C plays a role in protecting your body cells.  Vitamin D  Your body must have Vitamin D to absorb calcium, promote bone growth, and other important body  functions.