No, that’s why it is advised to have a well-balance and varied diet. For example, 300 mg calcium can be found in 250 ml milk (whether it is whole milk, semi-skimmed or skimmed), or in 190 g yoghurt or in 30g Emmental cheese, but also in 40 g blue cheese, 80 g Camembert or in 300 g of quark cheese (“fromage blanc”).