The population of the Slovak Republic living in the silicate geological environment (granites, crystalline schists, volcanics) have significantly worse health status (increased mortality for selected diseases) and shorter life expectancy due to deficit contents of calcium and magnesium in geological environment, mainly in the drinking groundwater. Probably similar is the situation also in other countries of the EU. We find necessary to inform people living in such unfavourable geological environment about this fact so they are able to realize easy measures (additional supply of Ca and Mg from other sources) to prevent these risks.