Calcium is one of the most important minerals for the human body. Among all the health benefits of calcium, the most important ones are that it aids in maintaining bone health and dental health, as well as the prevention of colon cancer and the reduction of obesity.it is required for proper bone and tooth growth. Calcium also reduces the occurrence of kidney stones, prevents PMS, regulates blood pressure, protects against cancer, prevents cardiovascular diseases, balances pH levels in the body, strengthens teeth and gums, aids in weight loss, prevents skin damage and hormone abnormalities, and transports nutrients. The Recommended Dietary Allowance (RDA) of calcium is as follows : 400 mg for 0 - 0.5 year infants; 600 mg for 0.5 - 1 year infants ; 800 mg for 1 - 3 years children ; 800 mg for 4 - 6 years children ; 800 mg for 7 - 10 years children ; 1,200 mg for males and females aged between 11 and 24 years ; 800 mg for males and females aged 25 years and above ; 1,200 mg for pregnant and lactating women. Each day, we lose calcium through our skin, nails, hair, sweat, urine and stool. We also cannot make calcium ourselves within our own body. A calcium deficiency can result in symptoms and illnesses including: brittle, weak bones, bone fractures, osteoporosis, problems with proper blood clotting, weakness and fatigue, delays in children’s growth and development and heart problems involving blood pressure and heart rhythms. High calcium levels in the blood lead to a condition known as hypercalcemia, which can have many causes, including calcium overdose. Symptoms of overdose include stomachache, constipation or diarrhea, headache, nausea and vomiting. An overdose can ultimately lead to mental confusion, irregular heartbeat, high blood pressure and coma.