Calcium citrate is widely used as a dietary supplement to provide essential calcium, particularly for individuals who have difficulty absorbing other forms of calcium. It is often recommended for people with low stomach acid or those taking acid-reducing medications, as it is more easily absorbed in such conditions. Additionally, it is commonly added to fortified foods and beverages to enhance their nutritional value. In the pharmaceutical industry, it serves as an active ingredient in antacids and calcium-fortified medications. Beyond its role in nutrition and medicine, calcium citrate is also utilized as a food additive, functioning as a firming agent, stabilizer, or preservative in various processed foods. Its ability to bind with metals makes it useful in water treatment processes to reduce heavy metal contamination.