Calcium is a nutrient associated with the formation, metabolism, strength and health of bones and teeth. High levels of calcium can affect the bioavailability and absorption of many trace elements, especially divalent cations such as magnesium, manganese and iron, and may also lead to constipation and hypercalcemia.
The reference intake of calcium for Chinese adult residents aged 18-49 years is 800mg/d, and the tolerable maximum intake is 2000mg/d.
Some research results suggest that calcium overdose may have an impact on the absorption of other trace elements, such as high levels of calcium can significantly reduce the absorption of iron in a single meal.
Calcium overdose may also occur belching, constipation; occasionally milk-alkali syndrome may occur, manifested as hypercalcemia, alkalosis and renal insufficiency; long-term overdose can cause rebound increase in gastric acid secretion, and hypercalcemia may occur.
Calcium drugs are best used under the guidance of a doctor, so as not to self-medicate and affect your health.