Calcium and Magnesium are minerals that are known to be essential for bone health.&ampnbsp;Along with these two important minerals, NOW&ampreg; Cal-Mag DK Caps provide Vitamins D and K.&ampnbsp;Vitamin D3, a fat soluble vitamin, has been shown to play a critical role in bone metabolism, as well as in the absorption of Calcium and Magnesium in the intestine.&ampnbsp;Vitamin K2 is a nutrient that further supports bone health through its participation in healthy bone calcification.*