Calcium is one of the most important minerals for the growth, maintenance, and reproduction of the human body. Calcium is essential for the formation of and maintenance of healthy bones and teeth. Osteoporosis is a common type of metabolic bone disease that is associated with low calcium levels. In this disease, calcium and phosphate, normally present in the bones, become reabsorbed back into the body from the bones. This results in brittle, fragile bones that are subject to fractures .
Many foods contain calcium but dairy products are the most significant source.
Milk and dairy products such as yogurt , cheeses, and buttermilk contain a more efficiently-absorbed form of calcium. Soluble fiber attracts water and turns to gel during digestion. This slows digestion and the rate of nutrient absorption from the stomach and intestine. It is found in oat bran, barley, nuts, seeds, beans, lentils, peas, and some fruits and vegetables. Insoluble fiber is found in foods such as wheat bran, vegetables and whole grains.