20) Seaweed
Seaweed is also a popular food with high calcium content. Only one cup will give you 73 mg of this nutrient, which is enough if you combine it with other calcium-rich foods throughout the day. Besides containing calcium, seaweed also has copper, iron, magnesium, and iodine. As such, it helps even with your thyroid function.
Seaweed can be a bit challenging to use at first, but once you get a grasp, you will see how versatile they are. You can prepare them in various salads, soups, noodle dishes, and more. It is a common ingredient in Ramen and other Asian foods.