Bone broth is an excellent source of calcium and many other minerals.
Broth can be made from chicken, beef, lamb, goat, bison or even fish bones for just pennies a cup and is a great way to add calcium to the diet.
Boiling and simmering the bones with vegetables over long periods of time allows the calcium and other minerals to dissolve in to the water.
Boiling and simmering seaweed with vegetables over long periods of time also allows the calcium and other minerals to dissolve in to the water.
Dark leafy greens are another great dietary source of calcium.
Collard Greens, Turnip Greens, Bok Choy, Kale and Broccoli all ranked really well for being absorbable sources of calcium.
Fish with bones are an excellent source of calcium.
Most kids allergic to milk can tolerate wide range of fish and sea food.