After the age of 40, the body slows down the formation of new bones. At this age, hormones like estrogen and testosterone start decreasing and old bone cells break down more. New cells are not formed as fast. The result is that the density of the bones starts decreasing and the bones become light and weak.

Calcium is the foundation of bone strength. If there is a deficiency of it in the body, then the bones start becoming weak, the grip of the teeth may become loose, pain and stiffness in the joints increases. After 40, at least 1000 mg calcium and 1000 IU vitamin D are required daily, so that the body can absorb calcium properly.