Green Vegetables: Broccoli, kale, spinach, and Swiss chard are good sources of calcium. Be careful how much spinach you have in your diet as it also contains compounds that inhibit calcium absorption.
Nuts: A cup of almonds beats a cup of milk when it comes to calcium. What? Brazil nuts are also a good choice, packing a whopping 213 mg. of calcium per cup.
Seeds: A cup of flax seeds contains 428 mg. of calcium among all the other beneficial compounds found in the superfood.