I have been taking EzorbCalcium for almost 2 years. I had a bone density scan done the week prior to beginning. I had been taking doctor-recommended Fosamax for 26 months and stopped taking it 2 months before I started with Ezorb. A C5-6 quadreplegic, I was diagnosed with osteoporosis in my hip and osteopenia in my spine. One year later I have low normal bone mass in my spine and have moved to osteopenia in my hip. I will take another bone density scan at the end of the month. My physician was surprised at the reversal. I have zero side-effects. My vitamin D comes from the sun out here in California.