I wish I could completely answer this, but I really don't know the spinal increase as it wasn't measured on the Dexa scans I have had. But I had taken Prolia for 2-3 years before Evinity and have returned to is now that I finished that 12 shot series. In the middle of all this, I realized that I was consuming massive amounts of salt and did not know it was depleting calcium, despite my supplements. I consume little dairy for other reasons. All I know is that my number was better after the Evinity.