Most Americans believe that the best source of dietary calcium, an esteemed nutrient for its ability to build strong bones, is from dairy. For many, it may seem like a no-brainer to include dairy in a healthy diet, but science now shows that dairy is unnecessary for adequate calcium consumption. In fact, new research from the Harvard School of Medicine concluded that milk may not be the best source of dietary calcium. The good news is that non-dairy sources of calcium are abundant. Calcium is naturally found in many foods besides dairy products.