Hi Neha,
Of course calcium supplements can help increasing bone density. The two main forms of calcium in supplements are carbonate and citrate. Calcium carbonate is more commonly available and is both inexpensive and convenient. Both the carbonate and citrate forms are similarly well absorbed, but individuals with reduced levels of stomach acid can absorb calcium citrate more easily. The body absorbs calcium carbonate most efficiently when the supplement is consumed with food, whereas the body can absorb calcium citrate equally effectively when the supplement is taken with or without food. But rather taking supplements go for natural calcium sources like yogurt, cheese, milk, etc. Ask doctor about the amount of calcium to be taken per day.