A steady decline of calcium occurs in most women after the age of 35. It takes on a more rapid course after menopause due to the decrease in oestrogen level. Bone mass reduction initially occurs in pelvic region. MediFast performs precise and reliable analysis for osteoporosis using GE Lunar DPX-MD+- with advanced technology known as DEXA (Dual Energy X-Ray Absorptiometry) to measure the bone density of femur, spine, and the whole body. Comparing with those ankle and wrist screening machines , DEXA is more accurate and precise.