Calcium
You will not need to take a calcium supplement as long as you make sure that your diet includes enough calcium. Easily identifiable sources of calcium in the diet are non-fat milk, cheese, and low-fat yogurt (as well as their full-fat versions), but there are also other foods that contain high amounts of calcium, such as tofu, edamame, salmon, almonds, winter squash, fortified juices, and cereal!
Studies have shown that people who get their daily necessary intake of calcium from their diet as opposed to those who end up using supplements end up reducing their risk of developing atherosclerosis, while those who take the medications end up increasing their risk. This is why you should never take any type of supplement unless you have discussed it previously with your doctor.
When it comes to calcium deficiency, it will come up when you are doing your yearly blood tests. If the level of calcium in your blood indicates that you indeed have hypocalcemia and you know that your diet includes enough calcium, then your doctor will prescribe you the needed dose of calcium supplements. Otherwise, it is not advisable to start taking them if you do not need them.