Strontium is a mineral found in seawater and soil. In your diet, you get it mainly from seafood, but you can also get small amounts of it in whole milk, wheat bran, meat, poultry, and root vegetables.
Strontium is similar to calcium. It seems to play a role in how your body makes new bone while it slows the breakdown of old bone. That means it may affect how strong your bones are. Some research says that women with osteoporosis may not absorb strontium as they should.