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Spinach is one of the best food sources of calcium there is (and other leafy greens are a close second). To compensate, your body will take calcium from your bones to keep your blood calcium levels where they need to be. Over time, this can weaken your bones and lead to osteoporosis.he Best Food Sources of Calcium. Contrary to popular belief, dairy foods are not the only sources of calcium. Here are some of the best food sources of calcium out there, including not only dairy foods but a range of others as well: 1  Spinach. 2  Turnip greens. 3  Mustard greens. 4  Collard greens. 5  Blackstrap molasses. 6  Swiss chard.
Top 10 Calcium Rich Foods. Calcium is the most abundant mineral in the body. Almost 99 percent of the bodyâs calcium is stored in the structure of the bones and teeth. The truth is, though, many of us arenât eating enough calcium rich foods. (And hint: Itâs not always about dairy.) Bone calcium is also used as a storage area to release calcium into the bloodstream when it is needed. Calcium is needed for so much more than bone health, though. Eating calcium rich foods makes it possible for our bodyâs to achieve optimal nerve transmission, blood clotting, hormone secretion and muscle contraction.