I just became aware of a strontium chloride product for bone health,
Eniva Strontium Mineral Liquid Concentrate. One fluid ounce (30 mL) contains 250 mg strontium. The ingredients are purified water, strontium (from strontium chloride), natural flavors, citric acid, sorbic and/or benzoic acid(s) [protects freshness], stevia leaf extract. A liquid may offer quicker absorption than tablets or capsules that must first dissolve in the digestive tract before being absorbed. 

https://eniva.com/strontium-mineral-liquid-concentrate-32-oz/?sk...