Calcium citrate tetrahydrate is a white, odorless crystalline powder that is highly soluble in water. This compound is a hydrated form of calcium citrate, and its tetrahydrate nature indicates that it contains four molecules of water for every molecule of calcium citrate. The powder typically appears as fine granules or crystals, making it easy to incorporate into various formulations.

As a dietary supplement, calcium citrate tetrahydrate serves as an excellent source of calcium, which is essential for maintaining strong bones and teeth. It is often recommended for individuals who require additional calcium in their diet, such as postmenopausal women, people with osteoporosis, and those with dietary restrictions that limit calcium intake. Additionally, calcium citrate tetrahydrate is known for its higher bioavailability compared to other calcium salts, meaning it is more readily absorbed by the body.

In food and pharmaceutical applications, calcium citrate tetrahydrate is utilized as a calcium fortification agent. It is commonly added to functional foods, beverages, and supplements to enhance their nutritional value. The compound also plays a role in improving the stability and texture of certain products, contributing to their overall quality.