Daily's Bone Builder supplies a balanced blend of essential nutrients for optimal bone health with betaine hydrochloride for improved absorption. Three tablets provide: Vitamin C 75 mg, Vitamin D3 7.5 mcg (300 IU), Vitamin K2 (MK-7) 45 mcg, Calcium 500 mg (from carbonate, citrate, phosphate & lactate), Magnesium 250 mg (oxide & aspartate), Strontium 15 mg, Boron 1 mg, Silicon 15 mg & Betaine Hydrochloride 75 mg.