Many foods and drugs affect the absorption of calcium, eat calcium tablets can not be consumed together with the following types of food: First, vegetables, especially vegetables containing high oxalic acid, and calcium taken together easily form calcium oxalate precipitation, affecting the absorption of calcium, such as spinach, amaranth, bamboo shoots, etc.. Second, calcium tablets should be avoided with soy products, soy milk, milk and other foods containing high calcium, so as not to affect the absorption of calcium. Third, calcium tablets should be avoided with carbonated beverages and foods containing more phosphorus, such as burgers and pizza, etc. When the body takes in too much phosphorus, it will affect the absorption of calcium. Four, should avoid taking with iron. Fifth, avoid high salt, high fat diet, excessive sodium intake will be excreted through urine, while taking away calcium elements, high fat will also affect the absorption of calcium.