If you’re a woman of a certain age, when you think of calcium your mind might wander to, “Got Milk?” The famous campaign from the ‘90s forever linked the idea of milk with strong bones and teeth. But why does milk help give you strong bones or teeth? You can thank the calcium. And that connection is correct — but it’s hardly the whole story. Calcium, the most abundant mineral in your body, also affects your heart and other important organs.