calciumcitrate

Calcium citrate is a chemical compound that is a salt of calcium and citric acid. Its chemical formula is Ca3(C6H5O7)2, and it is commonly available in anhydrous or hydrated forms, such as dihydrate. As a calcium salt, it provides calcium ions in a form that can be absorbed by the body.

Calcium citrate is produced by reacting citric acid with calcium-containing compounds such as calcium carbonate or calcium hydroxide. It is widely used as a dietary supplement to help prevent or treat low calcium levels and to support bone health. It is also used as a calcium fortificant in some foods and beverages, and is available in tablets, capsules, chewable forms, and liquids. In some products, it is combined with vitamin D or other minerals.

In terms of bioavailability, calcium citrate is generally well absorbed and does not require stomach acid for dissolution, making it a preferred option for people with reduced stomach acid or older adults. It can be taken with or without meals, though some formulations are optimized for specific dosing schedules.

Safety and interactions are similar to other calcium supplements. Calcium citrate is considered safe for most people when used at recommended doses, but excessive intake can lead to hypercalcemia or kidney stone risk in susceptible individuals. It can interact with certain medications, such as tetracycline and some thyroid drugs, so dosing should be spaced as advised by a healthcare professional. As with any supplement, users should follow product directions and consult a healthcare provider for personalized guidance.