Strontium (citrate) is an alkali earth metal, very similar in structure to Calcium, and has a similar effect in the body.* 99% of Strontium is located in the teeth and bones where it promotes replication of preosteoblastic cells, which maintain bone health.* Strontium is an excellent adjunct to other promoters of healthy teeth and bones.* Osteo Nutrients or Osteo Nutrients II are complementary formulas that enhance the benefits of Strontium Citrate since Strontium is most beneficial when combined with adequate Calcium and Vitamin D.*