Strong bones, Growth and Repair.
calcium
You can increase your bone strength by taking Calcium. As you get older you will need more amounts of calcium in your diet.
You need calcium for: bone growth and strength Muscle function Blood clotting regulating hormones and enzymes
For white and strong teeth and also for strong and healthy bones in are body.
Parathyroid Hormone.
It can! This is why you need to take protein juices and calcium in your vegetarian diet.
Calcium Carbonate (Lime stone).
Yes, there is. You need lots of calcium in your diet. And you should avoid things like salt, soda, caffeine, etc. There are diet plans available through doctors for free.
Calcium should be in everybody's diet especially if you are aiming for a healthy one.
Lactose in the diet
You ask this like craving milk during menstruation is the norm, which it isn't. Craving particular foods is your body telling you that you need something in your diet, with milk it's obvious that it's calcium and this would make sense as additional calcium is needed during menstruation, but there are better sources of calcium. Change your diet to include more calcium.
Calcium is essential for healthy bones.