I have taken this for years and when I started I was told I had the starts of bone degeneration. Since taking this, because calcium supplements didn't work, I have had a bone density tests come back with signs of bone building and now I am no longer worried about my bones while taking this. I have had 2 severe falls and no broken bones, thankfully. I think this supplement has protected me from any broken bones in these falls. I highly recommend this product.