IN OLD AGE, BONES BECOME BRITTLE

Bones of children are flexible. This is because it contains more potassium. In old age, the proportion of this comes down and so the bone become brittle. When old people fall and break their bones, it takes longer to repair.

Not only this . In old age, inside of the bones rust , so to say. Technically it is called  osteoporosis. Doctors do not normally check this aspect. Calsium too may be deficient. One must take plenty of eggs..