Calcium is vital for the strength and development of bones and teeth. Along with magnesium, it transmits nerve and muscle impulses and stabilizes cell membranes, decreasing their permeability to cellular toxins and allergens. Calcium is also necessary for proper blood coagulation. The UK and the WHO (World Health Organization) recommend 500-700mg per day not the US levels of 1,000-1,500mg. A dairy-rich diet and bone broth, nuts, seeds and green leafy vegetables may provide you with 600mg per day. If that is not possible you may use highly absorbed ReCalcia® in its picometer-ionic form.