Osteoporosis is a common disease especially among the elderly female demographic. Its occurrence can be found in cross-culture, region, and social status. There are several treatments existed with proven result to manage the symptom of osteoporosis, and a new research area on calmodulin is emerging. The underlying cause is calcium deficiency, and it ties closely to women in different stages of their life. At each stage, calcium is used for different functions and without sufficient supply, the continuous expenditure on the body's calcium deposit will eventually result in osteoporosis.