While women acquire 80-90 percent of bone mass during childhood and adolescence, bone-mass continues to increase until the early 30s. Bones become stronger and denser as more calcium becomes part of the bone matrix. But if enough calcium is not deposited in bones during childhood, they may turn weak later in life, leading to bone diseases such as osteoporosis. Similarly, deficiency of Vitamin D could lead to bone-softening (a condition known as osteomalacia) that can also lead to fractures and deformities. The major biological function of Vitamin D is to promote mineralization of the skeleton. Most foods do not contain any Vitamin D; sunlight is the only major source for this vitamin. Another important component of bone health is physical activity. Young women who exercise regularly, tend to achieve greater peak bone mass than those who do not1. To keep bones healthy, women in the age group of 19-50 years need 1,000 mg calcium, 600 IU (15 mcg) Vitamin D every day 2 and as per WHO\FAO 2004, 60 minutes a week of moderate-intensive aerobic activity.