The normal dose of calcium tablets does not affect the kidney function. The normal dose of calcium tablets needs to be absorbed through the gastrointestinal tract after taking, and some of the metabolites after absorption are excreted out of the body through the kidneys or intestines, so the normal dose of calcium tablets will not affect the function of the kidneys. However, excessive intake of calcium tablets may cause a certain burden on the kidneys and may affect the function of the kidneys to some extent, so calcium tablets should be taken under the guidance of a doctor and patients should not take too many calcium tablets on their own. The daily dose of calcium tablets generally does not exceed 1000mg, and there is a great deal of evidence that proper supplementation with calcium tablets or the use of calcium tablets such as calcium citrate can reduce the occurrence of kidney stones.