Decreased bone mass often refers to a decrease in the calcium content of bone tissue, resulting in decreased bone strength. Decreased bone mass is a result when a bone densitometer measurement is performed, indicating that the current bone density is low, often due to a decrease in the calcium content of the bone tissue, seen in some older people, and when the bone mass decreases, the bone strength decreases can easily fracture when the body is impacted. Bone loss is similar to osteoporosis, but does not reach the severity of osteoporosis, but if the bone loss, continue to aggravate, osteoporosis will be formed. Bone loss usually need to eat more food with higher calcium content, such as milk, shrimp, and under the guidance of the doctor, appropriate calcium supplements, such as calcium carbonate, calcium lactate.