Calcium is one of the most abundant minerals in the human body and plays a pivotal role in human physiology. About 99% of the calcium in our body is stored in our bones, primarily as a crystal lattice composed of calcium, phosphorous and hydroxide. In addition to building bones and keeping them healthy, calcium also plays a vital role in the basic physiological processes such as blood clotting, neural transmission, enzyme activity, maintenance of normal tone and muscle contraction. It is also involved in glandular synthesis and regulation of exocrine and endocrine glands as well as preservation of cell membrane integrity and permeability. Each day, calcium is lost through skin, nails, hair, sweat, urine and feces, but our body cannot produce new calcium. Hence, it must be absorbed from the foods we eat. In case of deficiency of calcium, it is mobilized from the skeleton, which can lead to bone loss and subsequent risk of fractures. Over time, this causes bones to grow weaker and may lead to osteoporosis – a disorder in which bones become very fragile. Postmenopausal women are the most vulnerable to osteoporosis.