The modern diet is deficient in two essential nutrients that contribute to bone building, calcium and magnesium. Low doses of calcium can contribute to an increase in the rate of bone density loss with age, while a lack of magnesium makes it more difficult for calcium to be deposited in the bones. It is often recommended that the ratio of dietary calcium:magnesium intake be 2:1, a ratio that Osteoguard provides, being enriched with Boron and Vitamin D and K, to facilitate the absorption of calcium by the body. Based on the content of Osteoguard in calcium, magnesium, vitamin K and D and Boron, it is recommended to administer one tablet daily as a food supplement in most diets, while the administration of 2 tablets daily is recommended for people following a diet low in dairy products or women during the postmenopausal period. It can also be combined perfectly with other multivitamin formulas. In cases where there is a disorder in the absorption of the administered calcium, its co-administration with Osteoguard Synergy can be considered, a preparation containing a soluble prebiotic fiber, which, as has been shown by numerous studies, increases the absorption of calcium, through the improvement of the intestinal flora.