Strontium is sold as the complement to the Algae Cal , in the products they offer as Osteoporosis nutrients.
And just so you know I took the Strontium for a few years , and yes, my DEXA improved by as much as 6 %, which at the time I thought was wonderful. However , when I got serious about understanding things better, I quit taking it. I know there’s endless testimonials on their site about the wonderful increase in BMD as noted on the DEXA’ following the use of these products. I do still take just the Algae Cal Boost currently . Do your own research and come to your own conclusions.